6400mAh Battery

I have 4 Bright Eyes lights. The oldest one is over 5 years old. Bought this battery as replacement as the oldest was not holding as long of a charge. These lights are awesome! So bright and powerful!

Great replacement batteries. Haven't tried them for a battery life in a single ride, but have certainly got 3 hours at least out of these on full power before charging.

I'm writing this review after owning for a month and 3 rides. I bought 2 and they both held charge on max output on a 1.5 hour ride.I'll report back after several month if charge hold changes.

Excellent back-up battery for our bicycle headlight.

Been using this brand light and battery for over two years. Solid performer.

Purchased to replace the batterry from my Bright Eyes 1200 Lumen light (Which I've had for 4 years now). The battery has a much better seal than the older batteries, looks like it will hold up better to the elements. The extended capacity is a nice bonus! I will update if it dies, but if there has been no edit, assume it is still running strong! (Note: I am a heavy evening rider)

I left this battery on the charger overnight several times, but each time, the charger continued to indicated that is was 'still charging' and that that battery never fully charged. And indeed, when riding, the battery lasted only a very short time and never really charged as it should have.UPDATE: I left the battery on the charger AGAIN, and this time it charged! Fully! --- The trick is, to leave it on the charger for at least 24 hours, maybe longer.

I've had by 1200 lumen light for at least 4 years now and have been involved in the purchase of at least 5 of the 1200 lumen lights from multiple suppliers. I ordered these last two batteries for a friend. I would definitely buy 6400mAh instead of the more standard 4800mAh battery since the 4800 mAh batteries haven't lasted very long before they quit taking a charge. I paid a little more for Bright Eyes batteries than I could find generics for because I've had bood support from Bright Eyes in the past. They answer their emails, replaced a light the failed for a poorly implemented strain relief, and had fixed the strain relief on the newer light we received as a replacement. These last two batteries I have received worked as expected and were delivered on time. Bright Eyes appears to pay attention to improving quality. The 2 strap support on the case works much better than just one strap does. The cord managment is improved the from the batteries I've purchased in the past.

Very nice product. I Think is very strong and usefull. The costumer relationship is INCREDIBLE. They send me 2 emails, explain how to use and care the product. Its the firs time its occur in Amazon. I strongly recommend it.

Great battery for bike lights

Had some cheapo bike lights. Kinda thought these batteries were all the same. This seems to last nearly twice as long as my other batteries. Quality case and the 18650 cells are in like a rubberized pouch. It does add weight but good for impact resistance.

Item is working well so far. The case is rubber more water resistance.

I had an old battery pack that wouldn't even give me an hour on full power on my main headlight maybe 2 hours on low before it was empty. After charging this one, I used my light for 3-4 hours on 3 separate trips, on low with a good amount of high mode use, before I chose to recharge it. It wasn't even empty yet when I charged it. I'm blown away at how long it seems to last with my light compared to my old batteries. It really adds a lot of piece of mind, being fairly sure you're light battery won't run out mid-ride.Update 11/28/16The connector doesn't make a connection anymore with the charger or a light. I'm 99% sure it has plenty of charge. I think something inside the barrel connector got disconnected somehow. Going to contact the seller.The seller offered me a pro-rated battery to replace the broken one.Update: 10/08/17So it happened again. I was out riding at night this time when my light went out. I Unplugged and replugged, and moved the cables around a little and could get the light on if I pushed the wire and connector together a little, and managed to get home by using a literal bandaid to try and keep it in such a way that it stayed on. It disconnected as I pulled into my driveway.The cells inside are still very very good, but they can't make a connection.These seem to last about a year/couple thousand miles before the wire going into the barrel connector seems to get loose somehow, despite my best efforts to ensure there was no stress on the connectors. Its happened twice now and I'm getting a battery case to put the batteries into instead of getting yet another replacement, unless they can offer a free one.

I was stupid and left my battery connected to the light for several weeks. Even though the light was technically "off", the circuitry still draws a small amount of current. After I discovered this, I tried recharging the battery, but after 24 hours, I got maybe 2 minutes worth of light. Bought the replacement and I'm back with several hours of bright light and a fair replacement cost. The new design is also much slimmer and more weatherproof than the nylon bag that came with the original battery.

Hopefully the battery lasts as long as expected. It is a great price and after charging, the light was very bright.

Takes a few time of charging it to full before it will keep charge while not in use, but after it is ready it is great.

Excellent for those long night rides

very reliable

Perfect in just about every way for me. I ride trails and roads after dark with this just about every day the winter. I’ve purchased 3 over the years.

Much better than the previous version.

This battery replaces one lost in a move. It works great.