Bright Eyes 10,400mAh Waterproof Bike Light Battery - Now Higher Capacity - Works with Most CREE 8.4v LED Bike Lights, and All Our 8.4v Lights (Blaze, Helios and Stamina Models)

Really good battery for my mountain bike! Lasts a very long time. Bought another for my GF’s bike and we used them several times a week on our late afternoon trips in town.

My old battery was no longer holding a charge, and occasionally I was worried about running out of power, so I upgraded to the larger one. I'm so glad I spent a little extra to get a spare charger, as it turns out my old battery was fine, but the charger was the problem. I had been thinking it would be nice to have one in my bike bag and one at home. I love the solid plastic case; it looks very weatherproof. The velcro straps keep it very secure. On my bike, I only use one of the two straps where it's mounted, and it's still solid. I would love if they would toss in an an extension cable to allow for mounting farther away, but the built-in cable is fine for most uses.

Great battery, lasts a long time, takes a real long time to charge

Ordered this to go with the accompanying light of the same brand. This battery is awesome. It's weather proof, lasts a long time, affordable and pretty tough. I ride all year around (including brutally cold temps and crazy hot days) and it's never left me without my light.

This is the second of these batteries I have bought, as I use two front lights attached to the Treks handlebars. This allows me to operate a 1800 lumen light at full intensity for well over 2+ hours, and I have never run out of charge during a bike ride. At lower intensities you probably would get well over 5 hours of light. If you use this every day like I do, then you should get at least 12-18 months out if it, before the storage charge nosedives...this is not a fault of the battery as ALL rechargeable batteries have a finite number of recharge cycles. The fastening system is excellent with buckles and Velcro, yet installs in under a minute- and there is no way it can ever accidentally fall off. I feel that this represents good value for money especially since it's high mAH rating is only a few dollars more than smaller batteries that only hold half the charge. When this eventually fails I will replace it with the identical model.

Battery stopped working today after ~ 3-4months. I've bought 3 other batteries from this brand and they last 1-2 years, I don't know what went wrong with this one, I hope I can get a replacement.

Great product if your connector fits, which mine did. Much larger capacity than the original.

Last long time