I find a good charger here is the details
XTAR WP2 II 18650/14500/16340 USB intelligent Li-ion battery charger
Charging qualifications and structures
Operation Temperature: 0~40℃
Input AC: 12V DC: 1000mA
500mA CC Current: 500m A±5%
1000mA CC Current: 1000m A±5%
Cut-Off Voltage: 4.2±0.05V
CV Cut-off Current: <100mA
Standby Current: <20.0m A
TC Current (Battery Volt 2.0~3.0V): 80±20m A
Auto Recharging Threshold Value Voltage: 3.9±0.15V
USB Discharging qualifications and structures
Operation Temperature: 0~40℃
USB Interface Output Floating Voltage: 5.0V
Output Floating Voltage Ripple: <120 mV
Reactive Current: <10m A
Maximum Output Current: 500mA
Battery Output Cut-off Voltage: 2.80±0.15V