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-   -   Battery charging (https://forums.steves-digicams.com/batteries-power-packs/20606-battery-charging.html)

Effen Feb 16, 2004 1:28 AM

Battery charging
 
To prolong battery life, I've heard rechargables should be treated differently depending on which kind they are. Here's the list of the main types of rechargeables and how I understand they should be treated.

NiCd - Allow to drain near completely before recharging

Lithium ion - Recharge to maximum as soon as possible and avoid draining the battery completely when possible

NiMH - ???

I don't know how to handle NiMH batteries and I'm not sure I have it right for the other two. How should each of these rechargeables be handled?

selvin Feb 16, 2004 1:40 AM

Try the following site:
http://www.steves-digicams.com/nimh_batteries.html

Onyx Feb 17, 2004 2:40 AM

NiMH were initially designed to overcome the shortcomings of NiCADs. I've heard various advice regarding their charging treatment, but I follow the engineering datasheet recommendations from Energizer - since they do go into depth about the oxidation chemistries at the poles, and various other superfluous info that made sense to me (probably too much info for mere consumers).

I bought a Maha C204 charger for its conditioning function. I condition my cells about once every 6 charges. They probably don't require it, but I feel better having done it.

Just know that ALL NiMH fast chargers will overcharge - that is a necessity for zero/negative delta V termination of charge or to switchover to trickle mode. With that in mind, I try to charge least frequently as possible - which means using them till the end. Also with the termination of charge detection, a higher current profile will overcharge cells the least ie. fastest smart chargers are the friendliest on cells (not the 1hr Rayovac which consistently kills cells).

Japair Mar 23, 2004 6:48 AM

Quote:

Originally Posted by Onyx
...(probably too much info for mere consumers)...

Well thas me cause I have no idea what you just said!

jawz Mar 23, 2004 9:34 PM

Lots of excellent technical, but easy to grasp information about battery technology/ care and feeding can be found here:

http://www.batteryuniversity.com/


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