Battery Tester EBC-A40L 5V40A Battery Tester Lithium Polymer Power Battery Capacity Tester 110V

This is the best battery maintenance device I have found for charging and discharging LiFePO4 batteries. You can set the device to charge, wait to settle, and discharge automatically in any order. If you have LiFePO4 batteries that you are storing for a later project, this machine is a must have. You need to cycle your LiFePO4 batteries at least every 6 months or so to keep them healthy. Set it to function, and it does the rest. This is the only battery charger I have felt safe running for two or three days unattended. I did keep a constant eye on it for the first few batteries I charged, but it earned my trust. I have charged and discharged many batteries in the month I have owned it. This is a great charger/discharger. The unit arrived in a few days and was packaged to the max. Complete air bubble envelope enclosure pouch surrounded the unit, packaged in a factory box, packaged in another box. It arrived absolutely pristine. Five stars for the seller also. I had some questions about the charger, and the seller was very fast, and helpful with their replies. Not to mention this seller had the best price on Amazon. To top it all off, the charger arrived in 4 or 5 days.