Battery for tablet

[Lord Bergamot]

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.

Is there a web site where I could get a new battery?
--

Don't let the Zombies get you!!!!

 

[Ian Field]

"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.

Just guessing - but its probably not unlike a laptop battery, in which case
almost certainly lithium.

Do not mess with lithium cells unless you know what you're doing!

Particularly multiple cells. They require a charge balancing system - if any
one cell gets over charged, it can go exothermic with a fairly entertaining
end of life performance.

 

[Lord Bergamont]

Ian Field<gangprobing.alien@ntlworld.com> wrote:

"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which case
almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if any
one cell gets over charged, it can go exothermic with a fairly entertaining
end of life performance.

That could be interesting.

The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.

I might open it again soon & get exact measurements. It would be easy to replace, if I knew where to get a battery.

--

Don't let the Zombies get you!!!!

 

[Ian Field]

"Lord Bergamont" <Lb@dot.net> wrote in message
newsoydnVE4vdGm9XTJnZ2dnUU7-Q2dnZ2d@giganews.com...

Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which
case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if
any one cell gets over charged, it can go exothermic with a fairly
entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy to
replace, if I knew where to get a battery.

If its an actual flat cell in a heavy duty PVC pouch - they just flame - the
steel cased cylindrical type have safety vents, but I'm guessing these get
clogged with debris as the electrodes disintegrate. A youtube clip shows
someone deliberately shorting a cylindrical cell - several long boring
minutes of fizzing rather tamely culminated in the cell going off like a
firecracker. There was a small shower of sparks that could easily be a fire
risk, the steel case ruptured so if you're holding it you'd get lacerations,
the caustic burns would be a serious complication to healing.

 

[Lord Bergamont]

Lord Bergamont<Lb@dot.net> wrote:

Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamont" <Lb@dot.net> wrote in message
newsoydnVE4vdGm9XTJnZ2dnUU7-Q2dnZ2d@giganews.com...


Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which
case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if
any one cell gets over charged, it can go exothermic with a fairly
entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy to
replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just flame - the
steel cased cylindrical type have safety vents, but I'm guessing these get
clogged with debris as the electrodes disintegrate. A youtube clip shows
someone deliberately shorting a cylindrical cell - several long boring
minutes of fizzing rather tamely culminated in the cell going off like a
firecracker. There was a small shower of sparks that could easily be a fire
risk, the steel case ruptured so if you're holding it you'd get lacerations,
the caustic burns would be a serious complication to healing.
There's a place in China that will sell me 1000 batteries, but not one by it's self.
--

Don't let the Zombies get you!!!!

I just checked EBAY and they have some there.

--

Don't let the Zombies get you!!!!

 

[Lord Bergamont]

Ian Field<gangprobing.alien@ntlworld.com> wrote:

"Lord Bergamont" <Lb@dot.net> wrote in message
newsoydnVE4vdGm9XTJnZ2dnUU7-Q2dnZ2d@giganews.com...


Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in which
case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing system - if
any one cell gets over charged, it can go exothermic with a fairly
entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy to
replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just flame - the
steel cased cylindrical type have safety vents, but I'm guessing these get
clogged with debris as the electrodes disintegrate. A youtube clip shows
someone deliberately shorting a cylindrical cell - several long boring
minutes of fizzing rather tamely culminated in the cell going off like a
firecracker. There was a small shower of sparks that could easily be a fire
risk, the steel case ruptured so if you're holding it you'd get lacerations,
the caustic burns would be a serious complication to healing.

There's a place in China that will sell me 1000 batteries, but not one by it's self.
--

Don't let the Zombies get you!!!!

 

[Ian Field]

"Lord Bergamont" <Lb@dot.net> wrote in message
news:HbOdnarb189XAW_JnZ2dnUU7-YmdnZ2d@giganews.com...

Lord Bergamont<Lb@dot.net> wrote:
Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamont" <Lb@dot.net> wrote in message
newsoydnVE4vdGm9XTJnZ2dnUU7-Q2dnZ2d@giganews.com...


Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in
which case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing
system - if any one cell gets over charged, it can go exothermic
with a fairly entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy
to replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just
flame - the steel cased cylindrical type have safety vents, but I'm
guessing these get clogged with debris as the electrodes disintegrate.
A youtube clip shows someone deliberately shorting a cylindrical cell -
several long boring minutes of fizzing rather tamely culminated in the
cell going off like a firecracker. There was a small shower of sparks
that could easily be a fire risk, the steel case ruptured so if you're
holding it you'd get lacerations, the caustic burns would be a serious
complication to healing.
There's a place in China that will sell me 1000 batteries, but not one by
it's self.
--

Don't let the Zombies get you!!!!

I just checked EBAY and they have some there.

Yesterday I scored a pack of 6x 18650 from the recycling bin at the
supermarket.

The previous haul was marked "Made in China" and had no laptop brand printed
on it - my main requirement is for e-cigarette batteries, I might designate
the Chinese cells for an application I don't hold near my face when I press
the button!

 

[Tim R]

Some laptop batteries are intelligent and won't charge unless conditions are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

 

[Lord Bergamont]

Ian Field<gangprobing.alien@ntlworld.com> wrote:

"Lord Bergamont" <Lb@dot.net> wrote in message
news:HbOdnarb189XAW_JnZ2dnUU7-YmdnZ2d@giganews.com...


Lord Bergamont<Lb@dot.net> wrote:
Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamont" <Lb@dot.net> wrote in message
newsoydnVE4vdGm9XTJnZ2dnUU7-Q2dnZ2d@giganews.com...


Ian Field<gangprobing.alien@ntlworld.com> wrote:
"Lord Bergamot" <lb@dot.net> wrote in message
news4GdnTWSAYhdrXXJnZ2dnUU7-UmdnZ2d@giganews.com...

The battery's gone wonky on my tablet. It takes a 3000 mah.
If I was able to get a battery, like maybe, a 6000 mah, would
it charge correctly, or would I need to go back with the same
type battery?

There is plenty of room for a larger size battery, longer, wider,
and even thicker. It would be easy enough to measure, I just
forgot to when I had the case open.
Just guessing - but its probably not unlike a laptop battery, in
which case almost certainly lithium.
Do not mess with lithium cells unless you know what you're doing!
Particularly multiple cells. They require a charge balancing
system - if any one cell gets over charged, it can go exothermic
with a fairly entertaining end of life performance.

That could be interesting.
The battery is flat, appx 5mm thick, 60 mm wide & 80 mm long.
I might open it again soon & get exact measurements. It would be easy
to replace, if I knew where to get a battery.
If its an actual flat cell in a heavy duty PVC pouch - they just
flame - the steel cased cylindrical type have safety vents, but I'm
guessing these get clogged with debris as the electrodes disintegrate.
A youtube clip shows someone deliberately shorting a cylindrical cell -
several long boring minutes of fizzing rather tamely culminated in the
cell going off like a firecracker. There was a small shower of sparks
that could easily be a fire risk, the steel case ruptured so if you're
holding it you'd get lacerations, the caustic burns would be a serious
complication to healing.
There's a place in China that will sell me 1000 batteries, but not one by
it's self.
--

Don't let the Zombies get you!!!!

I just checked EBAY and they have some there.
Yesterday I scored a pack of 6x 18650 from the recycling bin at the
supermarket.
The previous haul was marked "Made in China" and had no laptop brand printed
on it - my main requirement is for e-cigarette batteries, I might designate
the Chinese cells for an application I don't hold near my face when I press
the button!

Chinese make cheap crap. Last night I tried to unplug a Chinese made adapter from the wall, it fell apart and I was almost electrocuted with 110 volts.

Some day I'm going to take time to look around trash bins at the supermarket. I've heard good things can be found.
--

Don't let the Zombies get you!!!!

 

[Lord Bergamont]

Tim R<timothy42b@aol.com> wrote:

Some laptop batteries are intelligent and won't charge unless conditions are met, won't overcharge, etc.
It may not be possible just to put any battery into a tablet, I dunno.

Oh well.. The battery I ordered was inexpensive enough it won't matter, and I'm ready to buy a new tablet, if it doesn't work.

--

Don't let the Zombies get you!!!!

 

[Tim R]

On Monday, March 2, 2015 at 12:34:22 PM UTC-5, Ian Field wrote:

"Tim R" <timothy42b@aol.com> wrote in message
news:259e2b38-7247-4aee-a926-cbf57c37ba81@googlegroups.com...
Some laptop batteries are intelligent and won't charge unless conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.

We have an old Mac laptop with a missing charger.

I thought maybe I could remove the battery and charge it directly. There is not just + and GND on that battery, there are a lot of terminals and apparently a processor.

 

[Ian Field]

"Tim R" <timothy42b@aol.com> wrote in message
news:259e2b38-7247-4aee-a926-cbf57c37ba81@googlegroups.com...

Some laptop batteries are intelligent and won't charge unless conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.

 

[whit3rd]

On Monday, March 2, 2015 at 9:53:26 AM UTC-8, Tim R wrote:

We have an old Mac laptop with a missing charger.

I thought maybe I could remove the battery and charge it directly. There is not just + and GND on that battery, there are a lot of terminals and apparently a processor.

Yeah, the battery and charge circuitry is smart, which means it's a mess to
tamper with. The 'missing charger', on the other hand, is just a voltage source,
you can get replacements cheap, compared to a battery replacement price.

 

[Ian Field]

"Tim R" <timothy42b@aol.com> wrote in message
news:e9023f33-f59b-4728-868b-e251f4f7f0f7@googlegroups.com...

On Monday, March 2, 2015 at 12:34:22 PM UTC-5, Ian Field wrote:
"Tim R" <timothy42b@aol.com> wrote in message
news:259e2b38-7247-4aee-a926-cbf57c37ba81@googlegroups.com...
Some laptop batteries are intelligent and won't charge unless
conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.

We have an old Mac laptop with a missing charger.

I thought maybe I could remove the battery and charge it directly. There
is not just + and GND on that battery, there are a lot of terminals and
apparently a processor.

Multiple cell packs have sophisticated charge balancing circuitry - not all
cells are created equal, and the one that gets overcharged first goes
exothermic with fairly entertaining results.

You'd probably have to charge each cell individually - you could salvage the
end of charge shut off capsule from an e-cig and use a USB charger.

AFAICR: Most laptop chargers are 19V - you just need the right power jack
with the right centre pin polarity.

In the UK; I bought a universal laptop brick from Maplin (rip-off!) it has a
switch to select several voltages, and a rubber strip with an assortment of
changeable power jacks pressed into it.

Even at Maplin rip-off prices, it was probably a lot cheaper than most
genuine replacements.

 

[Tim R]

On Tuesday, March 3, 2015 at 11:49:06 AM UTC-5, Lord Bergamot wrote:

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--

Don't let the Zombies get you!!!!

How old is this thing? "Memory" issues on rechargeable batteries, to whatever extent they existed, were solved decades ago.

 

[Lord Bergamot]

Tim R<timothy42b@aol.com> wrote:

On Monday, March 2, 2015 at 12:34:22 PM UTC-5, Ian Field wrote:
"Tim R" <timothy42b@aol.com> wrote in message
news:259e2b38-7247-4aee-a926-cbf57c37ba81@googlegroups.com...
Some laptop batteries are intelligent and won't charge unless conditions
are met, won't overcharge, etc.

It may not be possible just to put any battery into a tablet, I dunno.

Most of the cells I've rescued for my E-cigarette seem to work just fine.

IMO; the 'intelligent' bit may often be a bit over zeallous.
We have an old Mac laptop with a missing charger.
I thought maybe I could remove the battery and charge it directly. There is not just + and GND on that battery, there are a lot of terminals and apparently a processor.

There are only two wires on this tablet battery. When the solder
broke where the charger plugs in, before I soldered it, I charged
the battery directly, which might have been what caused the
battery to go wonky, although it never worked really great from
the beginning.

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--

Don't let the Zombies get you!!!!

 

[Ian Field]

"Tim R" <timothy42b@aol.com> wrote in message
news:a9532fae-5a9c-4536-9718-580dff7b8cbb@googlegroups.com...

On Tuesday, March 3, 2015 at 11:49:06 AM UTC-5, Lord Bergamot wrote:

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--

Don't let the Zombies get you!!!!

How old is this thing? "Memory" issues on rechargeable batteries, to
whatever extent they existed, were solved decades ago.

There's a specific end point voltage per cell that you shouldn't discharge
below, overcharging can also shorten cell life (sometimes very abruptly!).

AFAIK: there is no memory effect associated with any lithium cells.

Apparently some manufacturers make chips with a constant power charging
mode - over discharged cells need to be coaxed up gently to a normal state
before piling on the normal charge rate.

 

[Lord Bergamont]

Tim R<timothy42b@aol.com> wrote:

On Tuesday, March 3, 2015 at 11:49:06 AM UTC-5, Lord Bergamot wrote:

I always had to let the battery get down below 20% before plugging
in the charger, to keep it working good, and if I unplugged it before it
was fully charged it started having problems.

--

Don't let the Zombies get you!!!!
How old is this thing? "Memory" issues on rechargeable batteries, to whatever extent they existed, were solved decades ago.

I bought it three years ago.

Except for the battery problems I've been happy with it.
--

Don't let the Zombies get you!!!!