Tianqiu AG5 10Pc Alkaline Button Cell Watch Batteries

They work as expected, good value.

Although I had no chance to test "longitivity" yet - the unloaded cells voltage deviation is less then 12mV across the batch - tells about somewhat decent quality. Purchased primarily for using in Coast keychain flashlights and thermometer. Be aware - these are alkaline cells, not usually more expensive silver-oxide (e.g., not intended for usage in watches - might work, but for much shorter time, though).

The expiration date printed on the baCK of the packaging says 10-2019. It is now 2-2020 so these are old batteries that should have expired four months ago.They work, but I have no way to measure how much of a charge they still have or estimate how much longer they will last before they die completely. Just realize that you may have to change out these batteries frequently since they probably only have a partial charge left. Disappointed about that, but glad there are 10 of them.BTW, all the writing on the packaging is in some Asian symbol language... Chinese? Taiwanese? Not sure, but definitely not English.

Batteries can vary in quality and price among brands. One thing to note is what the material the insides of the battery is made of. Alkaline batteries are the cheapest and provide decent power. However, the voltage output will drop as the battery is depleted. Lithium batteries offer higher capacity, but are more expensive. Silver Oxide batteries have the highest capacity and maintain their voltages the best over the lifetime of the product and are even more expensive.That being said, these batteries are alkaline based, so for lights (like LEDs and lasers), the light output will fade gradually over the lifetime of the product. If you need to drive a motor or mechanical device, once the voltage begins to drop, the drop motor performance will be very apparent.At two bucks for ten batteries, this is a great deal if you know what to use them for.

I bought these for my hearing aide. I took away a star because I've found at least one dead one in the package. However, so far, the rest have worked, and their longevity is as expected. The packaging also makes each battery easily accessible.

could last a hair longer but you get what you pay for

Arrived on time and I mainly used it for my rifle boresighters. The batteries lasted for a while--about a year. Highly recommended.

No worries, they worked great

Used in a misfit needed 3 batteries but only lasted 2 weeks then needed to be replaced.

Good value

Arrived very quickly, within a day or so. No problems. Very useful now that local stores no longer stock them.

No encontraba esas pilas por ningún lado. Me salvaron la vida. Si las recomiendo

Están bien para el precio que tienen no dura mucho pero...... por el precio que tienen van bien mejor que la de los chinos