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Back to GP KB34PUL Charger Page
| Question
#1: I am interested in purchasing the above. However I would like to know how the charger decides when to switch to trickle charge mode. Is it a simple timer function ie even if the batteries are near full capacity it will still charge for 5 hrs or does it have some sort of sensor to detect when the batteries are charged? Also how can it detect AAA cells which should take less time to charge? |
| Answer
#1: The GP 34PUL Fast Charger does operate on an Auto-Timed Charge cycle and switches to trickle charge after reaching the full 5.5 hour charge cycle in NiMH mode and 4.5 hours in NiCD position. Naturally if your batteries are near fully charged and you wish to just top them off you will not need to leave them in the charger for the full 5 hrs. Since "AAA" NiMH batteries are under half the capacity as the "AA" batteries it does not require a full 5 hour charge cycle. The instructions which come with the GP KB34PUL battery charger gives the amount of time required to fully charge "AAA" batteries after which time you probably should remove the AAA batteries from the charger. |
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| Question
#2:
I put in a set of batteries in my GP KB34PUL charger that were almost
fully charged to "top them off", yet the red
charging light remains on for the full 5 hour period. Then, after that,
if you plug it back in again, the charger goes for another 5 full hours.
My batteries get quite warm since they never fully get discharged in the
camera and reach full charge quickly. I usually recharge my cells after
a days shooting so that each set is fully charged, but if they are going
to be held to the full 5 hours all the time, this is eventually going to
damage my investment in cells. |
| Answer
#2: Actually each time you unplug the GP-KB34PUL battery charger and then plug it back in the battery charge cycle is re-activated and will run for the complete cycle. This is what you should do to recharge a set of batteries that need to be fully recharged for the full battery charging cycle.. However please note that
it is not necessary to unplug the charger once your batteries have been
charged unless you wish to start the charge cycle all over again. By
leaving the charger plugged in after you remove your batteries will
allow the GP-KB34PUL charger to remain in Trickle Charge Mode until you
unplug it and then plug it back in.
This way you can place your semi-discharged batteries back in the
battery charger later to be topped off (
brought up to full charge
) or this way you could allow you batteries recharge at a much reduced
and slower charge rate. |
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| Question #3: If the GP KB34PUL is a timed battery charger - what effect does the NiMH / NiCD switch have when flipped to NiMH versus NiCD ? Does it change the battery charge rate or what ? |
| Answer
#3: The NiMH / NiCD switch doesn't actually change the battery charge rate, but it does change the length of the battery charge cycle. When the switch is in the NiMH position the charger cycle will last anywhere from 5.00 to 6 hours versus 4.00 to 5 hours in the NiCD position. The actual charge rate ( 3V @ 250mA ) remains the same when charging NiMH or NiCD batteries during both battery charge cycles. |
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