My head units are in a decent state but the batteries are failing to hold a charge - I can't pick up gemini batteries from the source as they won't ship outside of the US without a light but Dunbar do have them - are there any other places that sell rechargeable packs that may be more cost-effective? Or should I just pick up the evo dh set and be done with it
I never buy cheap batteries anymore - they're just throwaway junk. Many Gemini head units and batteries are cross compatible with GloWorm. Both are compatible with the (total crap) MagicShine batteries if you're set on going low cost. You get what you pay for with batteries.
For sure, the gemini battery packs are a solid bet. The 18650/21700 batteries made by samsung are a standard but it's finding the charging packs and circuits.
I just opened up a 2014 Serfas light and replaced the LG 18650 batteries with new chocolate 18650 cells. The burn time is longer and everything works awesome. Have you considered taking your packs apart and replacing the cells?
Posted by: heathen
I just opened up a 2014 Serfas light and replaced the LG 18650 batteries with new chocolate 18650 cells. The burn time is longer and everything works awesome. Have you considered taking your packs apart and replacing the cells?
Where did you buy your new cells from? Did you use the type with built-in over-current protection?
Posted by: skooks
Where did you buy your new cells from? Did you use the type with built-in over-current protection?
Open up your pack first and verify what cells you have. LG, Panasonic, etc. Then just Google it. There is a ridiculous amount of buying options. You are literally just swapping cell for cell so you just reuse the old battery protection circuit.
The dead pack with board attached.
The fresh cells soldered up.
Great thanks. I didn't know you could solder directly to the battery terminals.
Posted by: skooks
Great thanks. I didn't know you could solder directly to the battery terminals.
Make sure you scuff the contact with sandpaper and use a very hot iron. I also use acid flux and lead solder. Clean the acid flux with alcohol when you are finished. It should only take a second to make the joint. You don't want to heat the cell up as it damages it.
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