Charging an alarm battery

[W. eWatson]

I have a Xantrex 12v rechargeable 600 Power Pack battery. Yesterday I
charged it up and then attached a 12v smaller alarm battery. I forgot
to check a few hours later. However, 8 hours later I disconnected the
two and found the alarm battery at 11.1 volts, and the Xantrex at 0%.
I'm recharging the Xantrex now. Did I somehow harm it?

 

[Tom Biasi]

On 5/20/2012 10:50 AM, W. eWatson wrote:

I have a Xantrex 12v rechargeable 600 Power Pack battery. Yesterday I
charged it up and then attached a 12v smaller alarm battery. I forgot
to check a few hours later. However, 8 hours later I disconnected the
two and found the alarm battery at 11.1 volts, and the Xantrex at 0%.
I'm recharging the Xantrex now. Did I somehow harm it?
Not enough info. Any answer would be a guess.

 

[W. eWatson]

On 5/20/2012 9:17 AM, Tom Biasi wrote:

On 5/20/2012 10:50 AM, W. eWatson wrote:
I have a Xantrex 12v rechargeable 600 Power Pack battery. Yesterday I
charged it up and then attached a 12v smaller alarm battery. I forgot
to check a few hours later. However, 8 hours later I disconnected the
two and found the alarm battery at 11.1 volts, and the Xantrex at 0%.
I'm recharging the Xantrex now. Did I somehow harm it?
Not enough info. Any answer would be a guess.

Well, I just recharged the Xantrex. I'll watch the charge over several

days.

 

[John G]

on 21/05/2012, W. eWatson supposed :

I have a Xantrex 12v rechargeable 600 Power Pack battery. Yesterday I charged
it up and then attached a 12v smaller alarm battery. I forgot to check a few
hours later. However, 8 hours later I disconnected the two and found the
alarm battery at 11.1 volts, and the Xantrex at 0%. I'm recharging the
Xantrex now. Did I somehow harm it?

Sounds like you connected them in series
ie plus to minus and minus to plus, instead of plus to plus and minus to minus!

But you should have seen the spark?:-?

--
John G

 

[W. eWatson]

On 5/20/2012 12:47 PM, W. eWatson wrote:

On 5/20/2012 9:17 AM, Tom Biasi wrote:
On 5/20/2012 10:50 AM, W. eWatson wrote:
I have a Xantrex 12v rechargeable 600 Power Pack battery. Yesterday I
charged it up and then attached a 12v smaller alarm battery. I forgot
to check a few hours later. However, 8 hours later I disconnected the
two and found the alarm battery at 11.1 volts, and the Xantrex at 0%.
I'm recharging the Xantrex now. Did I somehow harm it?
Not enough info. Any answer would be a guess.

Well, I just recharged the Xantrex. I'll watch the charge over several
days.

I sure didn't get any help from Xantrex on the this matter. They have
discontinued the battery. It had a six month warranty, but I bought it
14 months ago. After two days, it has dfropped to 70% charged. I'll try
the recharge tomorrow of the alarm battery with a far cheaper power pack
that I've used to kick car batteries into action.