... in different combination ways,etc;2) A+ battery cell with high capacity,low internal resistance;3) Stabal performance,long cycle times,>500 times ... service experienced.CertificatesUL,CE,RoHS,MSDS,UN38.3,IEC61233 Guarantee1 year. 100% real capacity.Our Quality is very nice.I have a ... price will be offered, welcome for long-term cooperation! 18650 3.7V Li-ion rechargeable battery