4 Pack- Shockli AA 3.2V LiFePo4 650mAh Battery, AA 3.2V Solar Rechargeable Batteries - Ideal for Solar Garden Light

I'm completely re-writing my review. I had previously given a 1 star review saying that the capacity wasn't a fraction of what they claimed.After some thought, I realized that they perhaps didn't ship the batteries with a full charge. I believe this is the case, and then putting them in solar lights 'dead' in a Minnesota winter gave it no chance to charge up the batteries to capacity.To test this theory, I bought a special charger that does 3.2v batteries. It also allows you to test the capacity. As expected, the batteries were dead, but after charging and running a test -- showed that they had 608 mAh capacity (one battery test), which I think is acceptable (they are never right on with the specs, and still far better than the 300 mAh batteries that came with my solar lights).I put them in the solar lights and they were bright all night long. Any issues I have beyond this point is going to be on the solar lights, and not the battery since their capacities are good and holding a charge.So the only recommendation I have for people is to get a 3.2v charger and charge them up when you get them, as they may be shipped dead. [this is typical of some manufacturers to ship them dead for safety]My apologies to the seller for initially posting a crap review when my understanding of the product was wrong.I *WILL* be buying again!

My deck posts have solar lights on the where the batteries are now several years old. Many decks I have seen simply let the batteries die and ignore them or, worse, simply buy new solar lights. Since the batteries should be removed for the winter anyway (I am in New England) it is a simple matter to replace them with new ones in the spring. It is an affordable solution, more environment friendly than new lights and will keep my solar lights burning bright.

Battery charger/tester showed a capacity in the range 613-634mAh which is close enough to 650 for me.I plan to use these in devices that use 2 or 4 AA batteries and where 1.2V NiMH's don't work very well. When a LiFePO4 battery is paired up with a dummy AA battery, the net effect is two batteries that have a nominal voltage of 1.6 each - which is about what a fresh, fully charged pair of alkaline AA's are.Take note that most chargers for Lithium batteries will not work properly for these LiFePO4 batteries. Most Lithium rechargeables are a Lithium Ion chemistry which has a nominal voltage of 3.7V; these LiFePO4 batteries have a 3.2V nominal charge and will be overcharged if the charger isn't specifically aware of the LiFePO4 difference. So make sure your charging system can deal with LiFePO4's.

These work as described renewed a few great older solar lights big difference! Check your sizes though

No life to them

I went back and read the instructions that came with the solar powered rechargeable path lights that I bought and discovered that only a specific size rechargeable battery, 650 mAh, was called for. They worked beautifully, holding the charge for a long time and lasing for the entire summer.

Needed these for a outside rechargeable light. Working great.

TLDR - MAKE SURE YOU GET THE GREEN BOX AND NOT THE PLASTIC CASEUPDATE ON PREVIOUS REVIEW: After posting my original people a nice rep from Shockli reached out to find out what had gone wrong. Since I had mentioned that my batteries arrived in a reusable plastic case, she asked for photos of the product I had received and noted that it was packaging they had not used in over two years. The new packaging is a green card paper box as seen in the attached photo.I reordered the batteries from Amazon, got the green box, and all 4 of the batteries worked: Let there be light! (in our front yard, at least)Thanks to Shockli for reaching out and for their apparent determination to offer good products and satisfy consumers: Thanks Linda!Previous Review:All Four Batteries Were Dead on Arrival - Batteries were well packaged - individually wrapped and in a reusable plastic case.Installed the first one - no joy. Tried it on different lights - No Go. Same thing for the remaining three.Tested them all with a multimeter and got readings of 0.0 and 0.1 - All. Dead.One of them was even faded and had small hard bumps under the wrap.Returned for refund - hesitant to re-order to see if this was aberration, but seems these 3.2volt LiFePo batteries are hard to find and the other reviews seemed positive...