18650 Rechargeable Battery 9900mAh 3.7Volt Flat Top 2 Pack Lithium Batteries for Headlamps Flashlights

Nothing hinky with these guys! Had a previous bad experience with a different supplier and got a bad cell..This supplier got me two fresh cells that arrived with a proper factory charge and they were in great condition and they are working great! I will definitely buy from these guys again in the future! As long as they and Amazon understand that the USPS is not to be used to ship my parcels...

great replacement for solar batteries that came with outdoor lanterns no longer sold. Flat top on battery as needed.

So... I figured this was a bit weird to be 9900mah - but had to buy it to find out. Tossed it on my charger next to my purple 3500mah and blue 1800mah - fully charged them up and then and ran them both thru a charge-test and than a discharge-test. my used 1800mah hit 2097mah, the 3500mah maxed out at 2501mah (had this one for awhile now) THIS 9900mah maxed out at 1202mah - there is NO WAY these are 9900mah..... :( I will be returning these as it appears to be completely false advertising.

Battery works fine so far.

After seeing this review, the manufacturer did come through with a refund, even though I’d missed the return window by a week. I do appreciate that, so I’ve raised this from one star to three. However, further research has shown that this can’t possibly be a 9900 mAh battery. It’s way too small to possibly have this capacity. I’ve picked up other batteries here on amazon that are slightly higher priced than these, but have much better reviews. Sometimes it’s just not worth it to shop on price alone.I am terribly disappointed with these batteries. The original battery that came with my rechargeable flashlight would last for about 30 after dark dog walks before needing a charge. Over time, that cut down to about a dozen walks, so I thought it was time to replace it. These new batteries last approximately 8 days before going dead. I’m better off with the original, three year old battery.

Be careful to look at the batteries you are replacing. Some batteries have a “button top” while others, with the same battery number, have a flat top. In my case, I inadvertently ordered the flat top, not realizing there were two types of batteries with the same number and these would not make contact at the positive pole in my radio. I should have ordered the button top style . I was able to fix the problem with a small piece of aluminum foil to make contact. This is not a common type of battery such as AA, AAA, C, D, which all have a button top. They are made in two different versions. The company saw my earlier unfavorable review and contacted me with the Offer of a refund.

The charge last a long time. Worth the price.

The batteries are fine however they don’t fit the flashlight we needed them for. However, they were as advertised and arrived promptly.