# Repairing Unhealthy Batteries

**URL:** <https://forum.hello-robot.com/t/repairing-unhealthy-batteries/713>\
**Category:** Knowledge Base\
**Created:** [May 19, 2023, 1:27am UTC](https://forum.hello-robot.com/t/repairing-unhealthy-batteries/713 "2023-05-19T01:27:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Visaacan\_Rathiraj](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.hello-robot.com/visaacan_rathiraj/32/465_2.png) [@Visaacan\_Rathiraj](https://forum.hello-robot.com/u/Visaacan_Rathiraj)\
**Post date:** [May 19, 2023, 1:27am UTC](https://forum.hello-robot.com/t/repairing-unhealthy-batteries/713/1 "2023-05-19T01:27:03Z")

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Please follow the Repair Battery Section in The Battery Maintenance Guides ([Stretch RE1](https://docs.hello-robot.com/0.2/stretch-hardware-guides/docs/battery_maintenance_guide_re1/#repairing-damaged-batteries) and [Stretch 2](https://docs.hello-robot.com/0.2/stretch-hardware-guides/docs/battery_maintenance_guide_re2/#repairing-damaged-batteries)) for proper battery repair procedure

Expected improvement of repair cycle:

You should expect a minimum of 24% improvement on battery duration if you follow the repair cycle steps above, as well as more consistent run time duration

| Testing Parameter | Stretch RE1 with Unhealthy Batteries | Stretch RE1 After Individual Repair Cycles |
| --- | --- | --- |
| Stretch Run Time Duration | 1hr 23 mins | 1hr 44 mins |
| Voltage Level Cutoff | 11.65V | 11.52V |

 ![Repair](https://canada1.discourse-cdn.com/flex030/uploads/hello_robot2/original/1X/cf2ec95338fdadee85154fd30515b043093a2f28.png)