Replacement Battery for Galaxy Watch 4 (40mm) & Galaxy Watch 4 Classic (42mm), EB-BR880ABY Battery for SM-R860 & SM-R880, with Repair Tools & Instruction

Arrived quickly. Tools were sufficient. Instructions were clear. The side buttons sensors were hard to get off, but fortunately, they include a flat razor which did the trick. It wasn't clear what the two included adhesive pads were for and they were not mentioned in the instructions. My watch powered up perfectly with 50% charge before charging the new battery for the first time. I will update this review if I encounter any issues,

After correctly installing it, my watch worked fine for about a month. Now the battery can hardly last a full day with the watch on energy save mode. Dont buy this low quality trash.

Worked perfectly for my Galaxy watch 46mm 2019. Only problem was the screw driver point was too sharp and I thought the screws were stripping but it was the point on the screw driver not allowing it to fit in the screws correctly. Other than that. Everything works perfectly and the battery is good.

This is a lovely kit. The included screwdrivers are better than I'm used to for these kind of kits, the other tools are nice sold plastic, and the printed instructions are crisp and clearly printed. Note that they're the instructions from the iFixit guide, which is for the Watch 5 (not Pro), which is very slightly different. Notably, the display connector is on the bottom on the motherboard, not the top, as noted in a comment on the iFixit website. It's worth reading the guide on iFixit in addition to the included printout, since there's a bit more information online. Overall I didn't have any problems, and the paper guide was nice so I didn't need to fiddle with scrolling on the phone or laptop. The battery itself seems to be good quality. My Watch Pro 5 runtime is now roughly 2.5 days with the display set to not always on, and with Sleep as Android sleep tracking each night. This is in line with my memory from when the watch was new. Update: Three months later, the battery is still holding charge for roughly two and a half days. I charged to full Friday night, today it's Sunday morning and the watch is at 10%. See attached photo of the watch charge state. The only complaint I can imagine, is that the battery terminal connections are slightly larger than the OEM battery, making the overall footprint just a bit larger, so I had to use quite a bit of force to get the new battery in the compartment. However it DID fit, which at the end of the day is all that I care about!

Was not able to change the batteries in my galaxy watch using these tools

Worked perfectly. Even though the support for the frontier is discontinued, this brought my galaxy watch back to life. After restoring settings back to how it was years ago before being stored away, the battery seems to last longer than the original. The included tools are cheap and I stripped the triangle bit on the second screw, but I have a professional kit I used instead. No big deal. Big thanks for helping me bring my old watch back to life!

Pros - fairly easy to install and worked as advertised - better than buying a new watch Cons - the plastic splunge is nowhere near strong enough to remove the watch back - screwdrivers have the same markings so which is which? They do have different colors though - instructions are not very detailed HINTS - watch a utube video before you attempt installation - because the screwdrivers are virtually indistinguishable, stab them gently into the cardboard and you'll be able to tell which is a Phillips and which is a Y - get a metal splunge, you'll definitely need it to remove the back. I had one from a watch/tablet repair kit - I had to go back in because the watch didn't start first time. I learned you MUST use the tip of your finger to make sure the 4 connections are seated properly - charge and completely drain the battery at least twice

The battery worked but the battery life is trash. If you are expecting this to replace your stock watch battery you will be severely disappointed. Without even playing on the watch or doing anything with it besides just wearing it, it wont even last 24 hours. I put it on in the morning, fully charged, and before I go to bed at night it is completely dead. This is on day 1 so hasnt even had a chance to degrade. Not worth buying.