iMahBT188645/BT288645 3.6V 900mAh Ni-MH Battery Pack, Also Compatible with VTech BT207695 VM312 VM3251 VM3252 VM3261 Digital Video Baby Monitor

these work great as replacement batteries for my 2017 Slendertone! Took a little effort to get the old one out, but the new one fit perfect.

Fantastic. There is a night and day difference between the original 800mAh battery and this. The factory battery, right out of the box, wouldn’t last throughout my daughter’s nap while this does and still has power remaining.Edit (06/25/2022): The battery didn’t make it even 1 year before exhibiting the same symptoms as the original battery. Roughly 8-9 months after it was installed, this battery began rapidly depleting and also going from about 66% charged down to 0% instantly - skipping all of the percentages along the way. Initially this did not happen, and it worked properly.Edit 2 (08/28/2022): The battery now lasts about 45 minutes before needing to be charged again. I will be replacing it with another brand that will hopefully yield better longevity.

Not sure how long this battery should last. I use with a "baby" monitor (caring for an elderly parent) & charge it every night. The device is black & white video with about a 2.5 × 3 inch screen & 2-way speaker, which rarely gets used. Anyway, this new battery lasts about 5 times longer than the old battery that came with the device & was used for over a year.

Worked as described, good battery life

Great off-brand product. Can't beat it for the price. We were about to buy a brand new baby cam until we came across this!

Update: Weeks later, no response from company, so dropped rating further from 2 stars to 1. Poor product, unresponsive seller, 100% would not buy again.------------------------------Pretty disappointing battery. It does work with my VTech VM3252 as advertised, but it's inconsistent at best. At the beginning, some days I'd get an hour or so of charge before the parent unit started beeping and I had to plug it back in; other days I barely got 10 minutes before the loud beeping began. Now, 3 months in, it's barely useful at all, so I'm tethered to an outlet anyway.I was really hoping this would work as a replacement for the original battery (which was starting to lose charge after nearly 3 years), with another baby arriving, but it appears I'm going to be out looking for a quality product yet again, because this wasn't it. Tried contacting the company, but they're not easy to get a hold of, so fingers crossed I have a reason to update this with a more positive change in the coming weeks.....

Great at first, didn't stay charged by 1 year. It was a great way to save our baby monitor but after 1 year the battery didn't hold a charge longer than 5 minutes.

It works great