Eco Cell - USB Cell Rechargeable AAA Batteries (4-Pack)
Model: CA-9911PK4-S
SKU: 4472100
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Customers are positive about the convenience of recharging the batteries via USB and the fast charging speed. However, they are negative about the short battery life, the sensitivity of the USB connector, and the difficulty in determining when the batteries are fully charged.
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Great idea, although I am sure you sacrifice mah's for the size need to remove the cap. The only other complaint I have, is you need to have these in the USB port just right. The AAs are probably better.
Posted by nickman2025
These batteries are great. I use them mostly in flashlights/headlamps when I'm working on the car or just around the yard. They make my lights significantly more effective and my life easier. That being said, I do have an issue or two with some functionality aspects. 1. is when you pop the top off to charge it, the USB part you plug into doesn't fit snuggly enough on some USB ports causing it to fall out or not able to make a stable connection. 2. is the little cap has a tiny magnet so you can stick it on the negative side to keep everything together. Well it's not super strong so it is able to become lost easier. 3. They don't power everything requiring 3 AAA. I have no issue powering 2 AA devices, however 3 AAA headlamps don't work. This may be a an issue with just my lights or the batteries. Otherwise great power and convenient abilities.
Posted by HippiLettuce
Easy to use and charge. Only draw back is one battery for one USB port.
Posted by midtherm