This is low priority because project requirements do not mandate batteries.
# Research a battery backup sample
## Problem environment
The battery backup mode allows low power operation in sleep and persistent configuration.
## Steps to reproduce
1. Refer to the L21 [20.6.4.3 RAM Automatic Low Power Mode](https://ww1.microchip.com/downloads/en/DeviceDoc/SAM_L21_Family_DataSheet_DS60001477C.pdf)
1. Refer to the R34 **ASF SAM R34 Low Power Application**
## Expected result
The battery backup mode is documented in a public sample.
## Actual result
The battery backup mode is undocumented.
## Resources
Rich information is available in [23.6.3 Battery Backup Power Switch](https://www.microchip.com/wwwproducts/en/ATSAML21J18B).
## Severity level
This is **low priority** because project requirements do not mandate batteries.
Research a battery backup sample
Problem environment
The battery backup mode allows low power operation in sleep and persistent configuration.
Steps to reproduce
Expected result
The battery backup mode is documented in a public sample.
Actual result
The battery backup mode is undocumented.
Resources
Rich information is available in 23.6.3 Battery Backup Power Switch.
Severity level
This is low priority because project requirements do not mandate batteries.
Something is not working derivative
Regarding a derived product duplicate
This issue or pull request already exists enhancement
New feature help wanted
Need some help invalid
Something is wrong question
More information is needed wontfix
This won't be fixed
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