why no BLE battery level holding for 3 hours only?

[nsureshbvn]

HI, I am using development board of BLE nRF52832 battery which you provide CR2032 is support for good battery backups

please give the reasons behind in it?

[Roger Clark]

Are you saying that you have a completely bland new board with no code installed, and if you leave it a few hours the battery goes flat.

That would not be at all surprising, as the processor will probably be executing any random code that happens to be in its flash memory or more likely has had a hard fault as its tried to execute code outside of the flash.

You'd need to load some code e.g. the beacon example, and then re-test the time it takes for the battery to go flat.

A CR2023 should last several months if you run the normal beacon code.

Of course this also depends on what else is on your development board. e. if it has a LED then the battery is bound to go flat regardless of what code is running in the nRF52