Ideally, charge them individually, like with the Eco or SmartCharger
from Saitek.
Of course, if they're soldered together...
Tom
On 15 Jul 99, at 5:23, HI100@xxxxxxx <olympus@xxxxxxxxxxxxxxx> wrote:
> Tom wrote a comparative review of different battery technologies and
> commented:
>
> << The memory effect is a myth. NiCds die from overcharging. >>
>
> If you talk to battery vendors they may or may not agree
> completely with this statement.
...
> In a properly made battery pack the cells are carefully matched in
> capacity by the manufacturer, this is generally not true for
individual
> cells (especially from different lots).
> As remarked by others on the list deep discharging a battery usually
> reverse charges the lowest capacity cell in the pack. This is very
bad for
> the cell and usually causes
> low resistance shorts that cannot be cleared by recharging. (You can
> usually
> recover
> these cells by applying a 100A pulse from a lead acid D cell for a
second
> or two but
> this is usually only a short term fix). The higher the volage
battery
> pack
...
> To maximize cell life it is important to keep individual cells
> together as a group to keep their
> capacity matched when charging and discharging: this reduces the
chance of
> reverse charging damage in deep discharge. Since most flashes don't
have
> low voltage cutoff circuits you should not experience "memory/volage
> depression" problems. In fact to maximize battery cycle life avoid
> completely discharging them.
>
> Sorry for this over long post.
>
> Tim Hughes
> Hi100@xxxxxxx
------------------
From: Tom Trottier, President, ACT Productions Inc.
infoanim@xxxxxx http://www.act.ca
+1 613 594-4829 fax +1 613 594-8944
199 Holmwood Ave, Ottawa, Ontario, Canada K1S 2P3
"Make it as simple as possible, but no simpler" - Einstein
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