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AJMRTC 5V 2.1A Li-ion Power Bank DIY Module, 3.7V to 5V Boost Converter Board, 4.2V Lithium Battery Charging & Protection Module with Power Indicator for Portable Electronic DIY Projects
- - Max 5V 2.1A output, converts 3.7V lithium battery to stable 5V power for portable small electronics
- - All-in-one integrated board, supports 4.2V lithium battery charging, 3.7V to 5V boost discharge and battery protection
- - Built-in multi safety protection including overcharge, overdischarge, overcurrent, short circuit and reverse connection protection
- - LED status indicator shows charging and discharging state, easy to check real-time working condition
- - Mini PCB design with high conversion efficiency, simple wiring, great for homemade power bank and electronic DIY builds
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AJMRTC 5V 2.1A lithium power bank DIY module is an all-in-one power management board for 3.7V / 4.2V single cell lithium batteries. It integrates battery charging, 3.7V to 5V boost conversion and multiple safety protections on one compact board.
It delivers steady 5V 2.1A output with high conversion efficiency and low standby power consumption. LED indicators help you view charging and discharging status at a glance. The protection circuits prevent battery damage under abnormal conditions. It is ideal for DIY portable power banks, small portable gadgets and electronic circuit prototyping.
- Brand: AJMRTC
- Input Battery: 3.7V / 4.2V single-cell lithium battery
- Output: DC 5V, Max 2.1A
- Function: 4.2V charging, 3.7V to 5V boost discharge, battery protection
- Indicator: LED working status indicator
- Protection: Overcharge, Over-discharge, Over-current, Short-circuit, Reverse connection protection
- Application: DIY Power Bank, Portable Electronics, Electronic DIY Projects
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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Return Policies
- Return for refund within: 30 days
- Return for replacement within: 30 days
- This item is covered by ThermalNest Return Policy
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