12Pcs 5V Boost Step Up Step-up Transformers Power Supply Module Lithium Battery Charge Protection Board for DIY Charger,with LED Display,USB and Micro Port
??Built-in charge and discharge power MOS;The existing power management chip on the market all are HOTCHIP HT4928S which the parameters is same as134N3P
??Two versions are shipped randomly.Old Version charge status indication. Red light flashes when charging; Long red light when full;New Version has no lights.
??The step up charging board can be connected to a lithium battery and connected in multiple sections of lithium batteries, as long as the voltage is 3.7-5.5V in parallel(only be connected in parallel, not in series)
??Available for various batteries like Polymer ,18650 Lithium ,Cell Phone ,Tablet and MP3 Battery
??it has protection functions, protect from over-charger / over-discharger/ over-load ( support charger and discharger at the same time )
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