Review on 5-Pack EBL 9V Rechargeable Lithium Ion Batteries With 600MAh Capacity And 5-Bay Charger For Smoke Alarm Detectors - 2A Input by Don Santos
You'll need a USB port to plug the charger into.
I'm old enough to remember when rechargeable batteries were newer tech. They weren't terribly reliable and ran out quickly.To be fair, I've only used one battery until empty, and I'm extremely impressed! I have a TENS unit with a setting that uses a lot of power. A regular 9v battery would last an hour or two, and have to rest before I could use it some more.I put a bettery in my TENS unit last night and it lasted HOURS! With this being a 5 pack, I could easily go a full day if needed. So first impression - wow! Much better than expected.
- The batteries have a low self-discharge rate, so they retain their charge even when not in use
- The charger may not come with all necessary charging cords, causing inconvenience
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