Or really treat yourself and do both — you deserve it. If your battery salvaging operation is too large for a single-cell tester, perhaps it’s time to upgrade to this 40-slot wall mounted unit.

But we recommend having your battery load-tested by a mechanic annually once ... Doing so tests its ability to hold voltage while being used, and the results will let you know when it’s time ...

Which is precisely what the Smart Multipurpose Battery Tester from [Open Green Energy ... If you want to safely use lithium-ion batteries in your own home-built devices, there’s a few things ...