Can anybody provide me a linear section of rechargable LiIon battery

[Terry]

I'm using nRF51822 for development. and I want to use ADC to measure the electricity of battery, but I don't know the discharge characteristic, i couldn't get that on internet. and DEMO in the SDK only shows the CR2032's linear section. Can anybody show me the rechargable LiIon's linear section?

[Håkon Alseth]

Hi Terry,

Most of my experience is with CR2032, not Li-ION. However, none of these two discharge linear. The tricky part with lithium-ion batteries is that most of them have different characteristics, so this is not a "one fits all" kind of operation. The best bet is to check the characteristics for the battery you're going to develop with and create a lookup table based on the measured ADC value.

If you google "lithium ion discharge curve" you will find many articles and plots regarding this topic.

Best regards Håkon

[Terry]

See that, thank you for your reply, I'll try other method.