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1. Charging indication: the charging display will show IN letters
2. Output load indication: long press the LED button after connecting the load, the output will start, the display will show OUT letters and the relative output voltage and current 5V1A or 5V2.1A
3. Protection function: the protection circuit of the boosted lithium battery has been integrated to prevent over-discharge, overcharge and overload
4. Note: B+ and B- connected to the boosted battery must not be reversed, reverse must burn, can be connected to a lithium-ion battery can also be connected in parallel with a number of lithium-ion battery
5. Capacity of not more than 200,000 mAh, voltage 3-4.2V can be used, lithium positive pole connected to B +, lithium negative pole connected to B-
6. Size: about 5.8 x 2.7 x 1.5 cm
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