Battery Charged or Not
The problem: It’s 3am and the wireless mouse has run out of juice. Scrounging through the battery drawer shows 13 double-A’s, but none of them have a charge. Maybe they were charged at some point, but rechargeable batteries don’t hold their charge if they aren’t being used.
All rechargeable battery manufacturers love to boast about their product’s current capacity (mAh). But there is a dirty little secret that they don’t want you to hear: self-discharge rate. Simply put: a fully charged NiCd of NiMH cell will gradually lose its stored energy over time. Technical papers I have researched typically put the self-discharge rate at 10-20% per month for NiCd cells, and 20-30% per month for NiMH cells. This kind of self-discharge rate is usually acceptable in applications such as digital cameras. via: Jeff
The solution: A social website for keeping track of:
- how many batteries you have charged
- which brands you use
- which devices used charged batteries
- when you last changed the batteries
- Collect stats will recommend the best batteries available in your area
- Monetized by referrer micropayments from all the battery sales
It can even have a local component for finding people who have the same interest in rechargeable batteries as you!
I kid! I kid! Contrary to popular belief, web apps aren’t the solution to every problem.
What you need is two queues of batteries, one for charged batteries and one for uncharged. The charged pile should stay mostly empty — you want some charged batteries for when you need them, but you don’t want them to stay there for months losing their charge.