Taken CR2 Rechargeable Batteries with Charger, 3.7V 450mAh CR2 Battery, 8 Pack RCR2 Battery with 4-Ports Charger (Not for Arlo Batteries)

Works as described

So far so good. These works described. Used them for lowering hunting electronics and flashlights on recent hunting trip. Simple to use. No issues.

In my haste to order replacement CR2 batteries and happy to see a rechargeable option, I didn't notice 2 very important differences.1. The height of the rechargeable is 1.08 inches (27.5 mm) and the non-chargeable is 1.05 (26.7 mm).2. The rechargeable battery is 3.7V versus 3.0V for the non-rechargeable.I needed to replace the battery in my SmartThings/Aeotec Motion Sensor and the battery was too tall to fit. My Aeotec Recessed Door Sensor 7 also uses CR2 but I didn't try to see the rechargeable battery would fit, probably not.I gave it 3 stars, as in, not good, not bad.My suggestion would be to warn buyers that not all CR2 batteries are created equal so the seller doesn't have to handle as many returns.When searching for CR2 batteries that fit, I did see one seller (EBL) pointing out the differences between rechargeable and non-rechargeable CR2s. All my searches including outside of Amazon, the rechargeables were the larger size or didn't specify the size.I also noticed that the rechargeable batteries are 450mAh versus the 1,000mAh of the non-rechargeable batteries I just put in my device. Some rechargeables are only 200mAh.UPDATE:The company reached out to me to get my feedback and offer a fix to my problem. KUDOS! So I bumped my review up 1 star. As I told them, I really wanted to keep the item but they just didn’t fit.

Great value for the money and fit well in my tac light.

So far so good. I didn't have enough time yet to find out if longevity is good, noir battery life. But I am pleased so far. I just like the idea of recharging these batteries. And glad to find them available.

The charger does NOT fit the batteries. There is about a millimeter gap that allows the batteries to slide back & forth. They do not make contact with both ends so there is no charging circuit. Even with pushing the adjustable end as close as possible, it still does not make contact.I have no choice but to return the batteries & charger.

It works well and does exactly what it claims, recharging batteries. Would buy again if needed!

It works great for day one use as they came pretty much fully charged. As I haven't used them yet to drained state, I haven't been able to charge them effectively so I don't know how well the recharge will work, but they work well as batteries.