I received the laser from Lazerer.com and they didn't include the battery it was supposed to be an 18650 li-ion battery, I found one on Amazon but it's Samsung and I don't know what maH to buy. The charger output is 3.7V/450mA end of charge voltage is 4.2+-1% the laser is a 100mw LZCS532-100 model, please help.