BlueDot Trading 3 Volt CR2430 Lithium Coin Cell Non-Rechargeable Battery for Watches, flameless Candles, calculators, and More. 3 Count (Packaging May Vary)

I tested the voltage on one when it arrived prior to installing it in the numpad for the MS Sculpt keyboard; I wanted to be sure the battery had power before testing the numpad because the numpad doesn't have an indicator light or anything. The battery was showing full voltage, and has been working properly ever since (about 1.5 months).Yay for batteries that work as advertised!Edit 2018-05-07: These batteries do not seem to last very long. I've had to replace the battery in my num pad several times since I bought these batteries. I have no other CR2430 batteries to compare to, so this might be a result of the MS Sculpt keyboard's numpad guzzling power. For now, I'm revising the review from five to four stars.

My old batteries that had been in the fob for years had better charge than these. They arrived almost totally dead.

The battery did not last 2.5 weeks after changing it with the old one of my Fossil Hybrit watch.

These are fine if you consider cheap Chinese Lithium batteries to be commodity items. The seller certainly does, because although all the pictures show "PKCELL" packaging, I was actually shipped Waha cells.Now, I have no idea if Waha is better or worse than PKCELL. I suspect they're all the same, in the grand scheme of things. All the ones shipped to me test at 3.31v unloaded, at least. I'm probably not going to be able to compare them against any other cells for capacity, though.They're *probably* fine, and I imagine you already know you're going to get inconsistent quality at this price-point. But if you actually want a specific manufacturer's cells, this is not the place to go.

Rec'd intact, as advertised, BlueDot Trading CR2430 Lithium Cell Battery, 3 Count. Installed one(1), which is working fine, two (2) spares. I don't know how long it will last but have no reason, at this oint in time, to assume they will last for many many months simple because it's in place as a "back-up" to my clock-radio which is currently plugged into an a/c outlet. What more can I say?

all 50 batteries were dead on arrival. they told me the batteries were from fresh stock. no replacement was offered. no more blue dot trading for me!

This is and odd battery size that is not very common. I was very happy to find 3 at this price. I use the Microsoft Sculpt keyboard/mouse/numeric keypad (keypad uses this battery), and find that the battery needs to be changed annually. Though I have no previous experience with this brand, it seems to last as long as energizer or duracel, though I have no data to support that. However, at this price, you cannot go wrong.

It came in a huge box, so there was some money lost in packaging there, but overall good product.It has been powering my keyboard number pad for months now