Myifan Bicycle Lighit Battery, Waterproof Battery Pack 18650 Rechargeable Bicycle Headlamp Battery Pack for CREE T6 U2 Light (bayonet connector)

Do not buy, NOT SAFE! Went for a 2 hour ride tonight, disconnected the battery pack from my light and was about to walk in my house to put it on charge. Felt something really warm in in my hand. Looked down and the battery pack was on fire in my hand. I Dropped it out of my hand and jumped on it to put the fire out. That was a very lucky escape. It could have burnt my house down or garage as I normally leave to battery pack on my bike till the following day.

The fact that there is no thread on the attachment means that it becomes disconnected easily. This means that this is only useful as a backup light. Spend a bit more and get one with a thread that connect more securely.

I've not been using it for long but it seems to work with my LED bicycle light - someone stole the battery but couldn't cut through the cable ties to steal the light. I bought this as the battery can be taken out of a pouch so I can quickly remove it when I'm at the train station.The battery itself isn't environmentally sealed so wouldn't stand up well to driving rain but it's fine for me.

Worth the price for the purpose that is doing, nothing to argue good product !

This was a to replace similar battery which also failed soon after purchase. Seller promised to supply replacement but despite numerous emails, this never materialized.

One charge and it is dead! An absolute waste of money. I would not recommend this to anyone and regret buying it - even though it arrived on time

Excellent!

Prompt delivery, well charged on receipt .