3.7 Volt 18650 Rechargeable Battery 3500mAh 18650 Battery 3.7V 18650 Button Top Battery for Flashlights, Headlamps (2 Pack, Grey)

When I started charging these batteries they were only at 40%, and it took about four hours to get them to 100% which is normal for these high capacity Li-ion rechargeables. Every step of the charging process both batteries evenly matched each other for % charge, and only deviated by one or two percent which is an indication that the manufacturer has a consistent manufacturing process and that they are of high quality.A discharge/capacity test was performed on both batteries. One came in at 3983 mAh and the other at 3877 mAh. Both results are well over the manufactures stated 3500 mAh.Both worked well in my Sreamlight flashlight and Tecsun shortwave radio without any issues.Of course time will tell how these perform over the long haul.