Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Computing > Digital Photography > Rechargeable battery life

Thread Tools

Rechargeable battery life

Wilt W
Posts: n/a
There has been a thread about NiMH self-discharge rate and someone's problem
with very short period of battery life even sitting idle. Some doubt the
claims of self -discharge that I have posted. Lest there be any further doubt
about facts vs. urban legend, I quote from a manufacturer of rechargeable

"Alkaline batteries stored at "room temperature" self discharge at a rate of
less than two percent per year...At 85 degrees F they only lose about 5% per
year, but at 100 degrees they lose 25% per year. ...
NiMH and NiCd batteries self discharge at a MUCH faster rate than alkaline
batteries. In fact, at "room temperature" (about 70 degrees F) NiMH and NiCD
batteries will self discharge a few percent PER DAY. Storing them at lower
temperatures will slow their self discharge rate dramatically. NiMH batteries
stored at freezing will retain over 90% of their charge for full month. So it
might make sense to store them in a freezer. If you do, it's best to bring them
back to room temperature before using them. Even if you don't freeze your NiMH
batteries after charging them, you should store them in a cool place to
minimize their self discharge.

The rate of self discharge for any battery depends on the temperature at which
it's stored at. Stored at 70 degrees F (20 C) NiMH batteries will lose up to
40% of their charge within a month. "


Reply With Quote
Bill Turner
Posts: n/a
On 07 Jun 2004 04:50:53 GMT, Removed) (Wilt W) wrote:

>I quote from a manufacturer of rechargeable

__________________________________________________ _______

May I ask which manufacturer?

Reply With Quote
Wilt W
Posts: n/a
Ok, I just discovered it was not a 'manufacturer' but someone in the business
of selling Li-ion and NiMH batteries...
Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
NIMH (rechargeable) and Alkaline non rechargeable Pebble Digital Photography 30 01-23-2007 10:12 PM
Rechargeable battery life related question Digital Photography 7 12-17-2006 03:40 PM
Battery life - rechargeable or lithium? Default NG ID Digital Photography 19 08-22-2006 09:52 PM
Short life of rechargeable battery pack Ray Digital Photography 1 07-12-2003 08:08 PM