I have SERIOUS battery hoarding issues (300 li-ions and counting), so when I saw these I couldn’t resist. Ordered three packs from this guy and all are as expected — Pink 2600 Samsung 18650s. No date on any of the packs I got, but all were charged to 2.5-2.9. As we have tried before to decipher the date codes on the cells themselves, I won’t be doing that foolishness again. All efforts ended in muddled confusion, so date of manufacture is unknown on these pinks. All batteries charged right up in the expected time and work as expected.
As the “outside” pack labels say 5200 and say that the batteries are made in Korea, pink 2600 Samsungs are about all the batteries therein could be, except for maybe LGs, which would be even better.
These pink Samsungs are some of my favorite 18650s, so my little hoarding mitts were almost aflutter when I saw these listed. For me, the fashionably colored pinks hold a charge next to forever. 4.2v two months later is 4.18 or even 4.19, unlike some Panasonics that drop to 4.15-4.17 in a few days or weeks. But more importantly, for me, they put out max power at startup for the longest of just about any battery before sagging out. YMMV, but I have tested many of my pack pulls (new and used) in high-power lights with a meter 15 feet away, and the pinks really seem to be among the best for initial holding power. And they’re no slouch in general-use output. PLUS, of course, Samsung has done extensive torture testing on intentionally shorting and overheating their batteries, supposedly without flame-outs and explosions, unlike some other manufacturers. Of course, these short-circuit immolation tests were done in open air, not with the shorted batteries in a sealed aluminum tube, but still Samsung cell safety seems to be some of the best.
Packs are about average to open. Not the easiest, not the hardest. Minimum of white goo on the cells rubs off easily with the angle edge of a wooden chopstick without hurting the label. Laser contact welds are easily removed with a couple Dremmel touches (BE CAREFUL to not go through the thin neg end on the cell with heavy-handed dremmeling.
Considering how tough it can be these days to find a decent 18650 battery, these packs tentatively receive the Ubehebe three thumbs up, but YMMV because it is afterall ebay. Of course, the resultant pack pulls are unprotected 18650s. If you are new to pack pulling, please read the various posts here and elsewhere about how to do it safely without burning a hole through your worktable or reducing your house to a pile of smoldering ashes.
Link no workie? Search for 5200 new laptop battery acer oem on the flea bay.
Hope this helps!