# DIY Lithium Battery Balancer and monitoring (BMS) **URL:** \ **Category:** Hardware\ **Tags:** powerwall, bms, diybms, battery\ **Created:** [8 November 2017 13:02 UTC](https://community.openenergymonitor.org/t/diy-lithium-battery-balancer-and-monitoring-bms/5594 "2017-11-08T13:02:53Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Robert.Wall](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/robert.wall/32/38246_2.png) [@Robert.Wall](https://community.openenergymonitor.org/u/Robert.Wall)\ **Post date:** [8 November 2017 13:42 UTC](https://community.openenergymonitor.org/t/diy-lithium-battery-balancer-and-monitoring-bms/5594/2 "2017-11-08T13:42:07Z")
> [@About Li-ion battery charger and battery monitor chips questions](https://community.openenergymonitor.org/t/about-li-ion-battery-charger-and-battery-monitor-chips-questions/5592): > > Recently, I want to build a system powered by 14.8v Li-po battery pack or mains power (selectable power path). When the mains adapter is connected, the battery will be charged and the system will be powered from the adapter. I’ve found a family of standalone charger chips by Texas Instruments doing exactly that. It’s the bq246xx. This family has some features like over/under-voltage/current protection. Since the battery I’m using is a 14.8v 4s Li-po battery I must use a cell balance chip. I fo… --- _[View the full topic](https://community.openenergymonitor.org/t/diy-lithium-battery-balancer-and-monitoring-bms/5594)._