How do you check the battery health of a power bank?
crwdns2934249:0crwdne2934249:0:
Is there a way to test the battery capacity? I have a couple Anker power banks, [link|https://www.amazon.com/gp/product/B01CU1EC6Y/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1|PowerCore 500|new_window=true] and [link|https://www.amazon.com/gp/product/B01JIWQPMW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1|337/PowerCore 26K|new_window=true]. Both are about 7 years old and been used very intermittently. I'm assuming the capacity has diminished with age, but want to get a better idea of how much since hoping to use them on an upcoming trip. The light indicator on both shows full though I can't recall the last time I charged them.
I'd also like to troubleshoot an Anker A1501 Jump Starter Portable Charger, which is about 8 years old. Noticed it seemingly stopped working 2-3 years ago. When plugged in it'll show as charging, but doesn't do anything if try to use the built-in flashlight or charging ports. Never used the feature to jump start a car.