Converting a Dual Li-On charger to charge 18650 battery packs |
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This dual charger is a dual 18650 Lithium Ion charger. It can charge two single 18650 batteries independently. It has a green and a red Led on each charger half that indicates when it is charging (Red) and when it is done charging (Green). In the photo above, you can see that I have converted this charger to also charge 18650 battery packs. I am charging a single 18650 3.6 volt 2400ma battery on the right charger and a 3x18650 battery pack on the left charger. Note that the 18650 batteries in my LED bike light packs are all soldered together in parallel. So you still have a 3.6 volt Li-On pack, you just add up the mah hours to get more burn time. In the battery pack above, there are 3x18650 3.6 volt 2400 mah Li-On's. This pack is now has a 7200 mah capacity. I use Anderson PowerPole connectors for my lights chargers and battery packs. I have more about that on that on my main bike light page. The specs on this charger are: Input: 100-240vac 50/60hz at 500ma max Output: 4.2vdc at 1Amp for each charger |
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Here's a shot with the back cover off. Note this picture shows SAE connectors, I have converted this charger to use Anderson PowerPole connectors |
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You can see I have noted where the plus and the minus are for each charger. I soldered a connector to the plus and minus of each charger and then the connectors exit the charger on each side so that I can tell which connector goes to which charger. |
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| Back Cover |
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I used a small wood rasp bit in a Dremel tool to create wire exit points in the rear cover. It takes about 2 seconds to do this and you have to be careful not to melt the plastic too much. |
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