# Why LiPo battery 5V supply power booster system board does not charge the battery properly?

**URL:** <https://community.sparkfun.com/t/why-lipo-battery-5v-supply-power-booster-system-board-does-not-charge-the-battery-properly/47007>\
**Category:** Power\
**Created:** [February 22, 2024, 12:21pm UTC](https://community.sparkfun.com/t/why-lipo-battery-5v-supply-power-booster-system-board-does-not-charge-the-battery-properly/47007 "2024-02-22T12:21:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nicholas185Smith](https://avatars.discourse-cdn.com/v4/letter/n/e19b73/32.png) [@Nicholas185Smith](https://community.sparkfun.com/u/Nicholas185Smith)\
**Post date:** [February 22, 2024, 12:21pm UTC](https://community.sparkfun.com/t/why-lipo-battery-5v-supply-power-booster-system-board-does-not-charge-the-battery-properly/47007/1 "2024-02-22T12:21:53Z")

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Hello, [[BallSportsGear](https://ballsportsgear.com/)

I bought the SparkFun LiPo Charger/Booster - 5V/1A to power my project with a single cell LiPo battery. The board is supposed to charge the battery via the micro-USB port and boost the output voltage to 5V. However, I noticed that the board does not charge the battery properly. The charging LED stays red even after several hours of plugging in the micro-USB cable. The battery voltage remains low and does not reach the full capacity of 4.2V. The board also gets very hot during the charging process.

I checked the connections and the polarity of the battery and they are correct. I also tried different micro-USB cables and power sources, but the problem persists. I measured the current drawn by the board and it is only around 100mA, which is much lower than the expected 1A. I suspect that there is something wrong with the PAM2401 IC or the protection diodes on the board.

Is this a known issue with this board? How can I fix it or get a replacement?

Please help me to fix this issue. Any help would be appreciated.

Best regards,

Nicholas185Smith]([https://ballsportsgear.com/](https://ballsportsgear.com/))

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**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\
**Post date:** [February 22, 2024, 8:23pm UTC](https://community.sparkfun.com/t/why-lipo-battery-5v-supply-power-booster-system-board-does-not-charge-the-battery-properly/47007/2 "2024-02-22T20:23:47Z")

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Double-check the internal resistance of the Lipo or try a 2nd battery to rule it out as a cause; if nothing changes: Was it purchased from us? If so head over to [www.sparkfun.com/returns](http://www.sparkfun.com/returns) (contact vendor if purchased elsewhere) and we’ll get ya squared away