Batteries for school project

Hello, I have a question about batteries and thought someone here could
help me. I have a school project that requires the use of batteries and
have a choice between alkaline or heavy duty. I've read that alkaline
batteries are supposed to be much better and last longer as well as
operate better in cold temperatures (the project will be outside in the
cold). Heavy Duty batteries are no where near as good as alkalines are
they?

 

they deffinatlyarent.Alkaline batteries last longer than heavy
duty,they also have better power If you would use them in a flashlight
it would be brighter than if you used heavy duty batteries.So i would
say alkalines are 10 times better than heavy duty.

 

[Ken Taylor]

<gnvv111@gmail.com> wrote in message
news:1103756826.454226.262850@c13g2000cwb.googlegroups.com...

Hello, I have a question about batteries and thought someone here could
help me. I have a school project that requires the use of batteries and
have a choice between alkaline or heavy duty. I've read that alkaline
batteries are supposed to be much better and last longer as well as
operate better in cold temperatures (the project will be outside in the
cold). Heavy Duty batteries are no where near as good as alkalines are
they?

You should maybe look at lithium batteries if that's possible (not sure if
the choice has been made for you or not), as IIRC the temperature
performance of these batteries is better and you can get more grunt per
cubic inch. If the choice really is between those two types, then it will
depend on how much current you need to supply, but I'd be betting that
Duracells or equivalents will go better at the lower temp's. But again, how
low is 'low'?

Ken

 

[Ducky_Doug]

Howdy, One of the jr highschools every year come into my RS store and buy
different types & sizes of batteries. They perform load test, duration
test and cold tests. They have found that HD batteries are best buy in $
per amphr. But are not much good below -10 deg C. Alakalines last about
2-3 X longer depending on the brand and lose about 50% life at -30 deg C.
Lithiums last about 8-12 X longer then HD's and lose about 10% life at -30
deg C. They found the load factor affect the life and usability of the
battery at low temperatures. Insulating the battery has a big affect on
the performance at low tempatures, expecially at higher loads.