• Size: approx. 2.6 x 1.7cm/ 1.02" x 0.67"
• Input voltage: 5V
• Charging cut-off voltage: 4.2V ±1%
• Maximum charging current: 1000mA
• Cell overdischarge protection voltage: 2.5V
• Cell overdischarge protection current: 3A
• Charging and protect circuit at the same time
• LED indicator- red is charging Green is full charged
• Micro USB female outlet for input end, can be used to charge the lithium battery by phone charger directly. Besides, it still retain the input voltage wiring welding spot, good for DIY
• "OUT+" and "OUT-" may have no output voltage when you connect them first time. You can protect circuit by accessing 5V voltage. Same as "B+" and "B-" area.
• If you use phone charger to charge this device, please be sure the input current over 1A, otherwise, it may won't run properly.
• Connect "B+"to positive electrode of battery and "B-" to the anode. Connect "Out+"and "Out-" to load.

Instructions:
1. The test current ammeter can only be concatenated in 5 v input pad.
2. The charging current is the best battery capacity of 0.37 C, is 0.37 times, the capacity of 1000 mah battery charging current of 400 that will be enough.Too fast charging effect is poorer, rushed over battery voltage drop is much!
3. The charging connection wires cannot go too long.This connection resistance.Too fine rushed over battery voltage drop is much.
4. Good contact with the battery connection is best.Or rushed over battery voltage drop is much.
5. If 5 v input voltage on the high side, 5.2 and 5.5, for example, can cause lack of charging current 1000 ma, this is normal.The high voltage chip fever will automatically reduce the charging current, chip burned down.Chip in the work of about 60 degrees fever is normal.After all, charging current is big.
6. Enter the reverse has no effect on the chip, but the output (battery) reverse connection will burn out the chip, buyers, please note.

• 2pcs x 5V 1A Micro USB 18650 Lithium Battery Charging Board