Thanks for the info but, as I understand your description, the adverse
effects only come about if, after draining the batteries to the capacity
of the smaller you then recharge them simultaneously in the same charger
which risks overfilling the larger. My Maha chargers charge batteries
in pairs. What damage (if any) would occur if I always recharged the
batteries paired by their respective capacities?
Chuck Norcutt
Ian Manners wrote:
> Hi Chuck
>
>> Negative charge????
>
> Yes, you can end up with the lower capacity battery being
> reversed polorised, in the case of using them with flashs it
> would be minor, which is why I said that you would be
> diminishing the life of the lower capacity batterys, goes for
> both Ni-MH and Ni-Cd's. Not good to drive either type to
> -0v. As stated in my first email (with grammar corrections ;-)
>
> "2400 & 2500 are close that I would think the danger of
> leaking or exploding is not high but you will diminish the
> life of the lower capacity batterys by doing it."
>
> [Now, we have two glasses of milk and we will now show
> you how this leads to the goodness of 2 1/2 glasses of milk
> in each bar of Cabruarys Dairy Milk Chocolate]
>
> Think of the two batteries as two cylinders of water with
> flexible membranes on top of the cylinders, one has 2.4L
> and the other has 2.5L in it, both are drained through tubes
> at the base of the cylinders to a shared reserve of liquid by
> applying pressure to the membranes at the top but only for
> the same length of time until one is empty (ie, enclosed system
> as the batteries would be). The 2.5L cylinder will of cause have
> water left in it. Again using the same resouvhose on each, same
> water pressure, same amount of time each, fill both cylinders.
> Wont be long until the difference in the amount of water in each
> cylinder is vastly different, or one overflows.
>
> Now, if you push it to empty both cylinders of water completely
> in an attempt to balance them, you run the risk of breaking
> the membrane on the 2.4L cylinder as it needs to go into
> negative pressure to keep up with the 2.5L cylinder.
>
> Sounds like a load of shit doesnt it, looks better if I used a
> white board (dont go there you older aussies).
>
> Most but not all battery types can be reverse charged, and
> at the swing stage they can get very hot. Normally when this
> happens the discharge capacity of the battery will be greatly
> diminished unless they are correcty charged again but still
> with a very high likelyhood that there life expectancy will
> be greatly diminished.
>
> Why do you think battery manufacturers put those little print
> warnings on battery packs that no one reads :-)
>
> Or dont you have them over there ?
>
> Cheers
> Ian Manners
> http://www.comkal.net/
>
>
> Open Source means "curtains" for Windows.
>
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