Very good product but wanted more to keep Olight functional well into the future if they stop making this specialized battery. Battery Junction had it in stock, was less expensive, shipped next day. Amazon and Olight store were both back ordered on this battery which is required for the S1R Baton II and III if you want a rechargeable. 5 stars!

This battery is used in Olight's rechargeable models, S1R Baton II and Baton 3, which require the use of this cell. I preferred their S1 Baton, which had a similarly strong magnetic base, but could use the long shelf life, higher capacity CR123 primary Lithium and more standard 16340 Lithium Ion rechargeable cells. This cell is a proprietary mechanical variant that might not work in other brand lights that take 16340's. It is a shame that the S1R Baton II is no longer offered, since it is a much more versatile design, especially for uses such as glovebox emergency light and bug out bag lights as well as EDC light. Given that the S1R II and Baton 3 require this proprietary battery, I decided to get spares.

Batteries arrived in a timely manner and work perfectly.

Fit right in the s1r baton ii! Works great!

Baton 3 will ONLY use this battery, which is a little bit of a shame, but these are cheap so I have purchased 2 extra ones and I'll cycle through them to keep them all equalized and in good shape.

Olight has designed a line of batteries to rival them all with this little powerhouse. This 2 watt hour delivers reliable performance over many other batteries in their size range, like the CR123A line which usually only packs 200-300mAh. The IMR16340 packs a whopping 550mAh into a similar form factor. However, it is a proprietary battery designed for the Olight S1RBatonII, so you must use this battery. Olight did it right though! A very impressive cell that performs much better than others in their size range.

This battery is a must when it comes to having a spare for your Olight S1R Baton 2. Having this spare battery means you don’t have to be out of commission with the S1R Baton 2 due to the flashlight needing to be attached to the magnetic charging cable and plugged into a USB power source to charge the battery. The battery measures 34.4mm long. I am happy with the purchase.

This battery powers my Olight S1RII, and provides me with 1000 lumens in a compact package. It recharges easily and will power a flashlight for a long time--amazing in such a small package.

Works perfectly in my S1R II. Will buy again if necessary.