Originally Posted by
buzzbee
....I think I will buy a new battery from somewhere, ... don't know where, are there good options?
As I stated over a week ago, send it back under warranty claim. GMG has a 12 month warranty on the battery:
http://www.geomangear.com/index.php?...age=page&id=23
If you want to buy a second one, I can recommend this one:
http://www.ebay.com/itm/New-WATERPRO...item4154fe4bce
Mine lasted 12 months (over 100 recharge/discharge cycles). A backup battery is a very good idea for all these 2s2p 18650 batteries, because they typically don't last more than 6-12months.
Don't be surprised if the replacement GMG battery behaves like the one you have now. I've had two of them, and neither one seem to work as well as the originals.