Replacement for Battery Custom Battery Pack 14500/750/3.7V

26MAR23 My original headline on 21AUG22 read:Nice batteries, but they're not Button Tops, so if you need the protrusion it won't work.Now I see the product has changed to a Button Top. Hurray! I guess. LOL21AUG22As far as performance goes these cells measured 864mAh & 873mAh which is well above the 750mAh spec (see photo). I purchased these cells for a flashlight that was dual powered, either by 1.5V AA or 3.7V 14500 Li-Ion batteries. I didn't realize that I needed Button Top cells to make the positive connection inside the flashlight. These cells wouldn't work until I extended their nose with a wire clip that I fabricated. If I had to do this again I would have looked for a Button Top battery. However, these work great, and especially if you don't need the button. I'm happy.

They fit my oral b io8 perfectly. Seems to charge easily and lasts longer than the old one. I use about 5% per brushing as opposed to 20% from the previous battery. If they crap out early, I'll update.

I was hoping these would be good but I clearly drew the short straw. I charged the batteries on my charger once they arrived. They topped out at 365mAh and 350mAh. To make sure the charger was correct I grabbed the multimeter for a second opinion. Results in the photos.These will be going back since batteries that are only going to last half as long as their advertised capacity are pretty close to useless to me.

Worth it

Good product

So far they are working well. They are for a flashlight that takes one cell of an unusual size to make it work and this one fit the bill.

I purchased this set of 2 with no expectations. I just needed some spare 14500's for my small edc flashlights. I did test the capacity on these to see what the true measurements were on my battery charger/tester. After 3 separate tests (with a few hours of use in between) they averaged around 658mah. The first test averaged 658, the second test 654 and the 3rd 662. The output on my flashlight is still fine. The voltage is spot in with the batteries. However, it is not accurate in the capacity. At least with the pack I received. I did however purchase a 4 pack at the same time for around the sane cost as these 2 in order to compare. Those averaged close to 900mah in each of the 3 tests I performed. Maybe these 2 purchases were a fluke and I received a rare lower capacity on these and an uncommon higher capacity on the 4 pack. Who knows. The name of the ones that were as advertised were, Fitinoch Replacement for Rechargeable Battery Custom Battery Pack 14500/800mAh/3.7V (4 Pack). I can't attest to every battery performing as low as these did or as high as the 4 pack. Just what the tests showed. For all I know these could last a lot longer than the 4 pack at the higher capacity. Just throwing my 2 cents out there.

Several reviews claim the batteries do not "charge to capacity". It seems they don't understand the difference between measuring current draw (Amps) and measuring current capacity (Amp Hours). (eg. S Glenn July 6, 2023) Reviews need to be fair.The batteries I have received performed (measurably) better than specified. I'm hoping that Chinese manufacturers have learned to quit over-promising and under-delivering!