NiMH Battery Query

G

gilera

New Member

• Sep 6, 2013

• #1

I have a 7.2volt 3300Mah sub C battery pack and i wish to replace the cells. I have a choice of 3000 or 3600 Mah. Can somebody please tell me which would be preferred bearing in mind the charger is built into the test set that the pack fits in to.

 

dr pepper

Well-Known Member

Most Helpful Member

• Sep 6, 2013

• #2

Dont think it makes a lot of difference.

If they are ni-cad then I'd go for the 3000's, and if nimh 3600's.

Oh yes weldome to the forum.

 

G

gilera

New Member

• Sep 6, 2013

• #3

Thanks for the welcome, the pack is Nimh so i guess i will go with the 3600.

 

dr pepper

Well-Known Member

Most Helpful Member

• Sep 6, 2013

• #4

I only said that as nimh's are less subject to the memory effect.

 

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Sep 6, 2013

• #5

The size could be SLIGHTLY different. It may or not be a problem.

I have a gas detector which uses AA batteries, BUT only a NiCd AA will work. It's not a pack. A standard AA battery is slightly too long.

I always check the size. Most of the time I get my packs from Digi-Key.

 

G

gilera

New Member

• Sep 6, 2013

• #6

Thanks, have checked measurements they are OK.

 

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Sep 6, 2013

• #7

Then go with the highet capacity that will fit.

 

audioguru

Well-Known Member

Most Helpful Member

• Sep 6, 2013

• #8

Modern pre-charged Ni-MH battery cells are nice to have because they hold a charge for nearly 1 year, their capacity is a little less than older cells. Ni-Cad and old Ni-MH cells become dead in a month even if they are not used (useless for an emergency flashlight or radio).

 

J

Jibby

New Member

• Sep 12, 2013

• #9

3600 Mah

 

M

MrAl

Well-Known Member

Most Helpful Member

• Sep 12, 2013

• #10

Hi gilera,

I read "sub C" but i dont think i saw "NiMH" with that when referring to the OLD pack. Was the old pack NiMH or NiCd ? Because if it was NiCd then you have to change the way it is being charged. The old charger would have been made for NiCd not NiMH. There's a difference.
I'll wait for you to verify or correct this fact.