Save your money. It doesn't hold a charge long enough.
582322
Why don't I like it? It fits in my ear perfectly, but that's all I can say that's positive. It's annoying that the speaker changes from Chinese to English arbitrarily, but that's not the major reason not to buy this product.

Save your money. It doesn't hold a charge long enough. I don't know why, but that's not my job. It's their job to have a battery that holds a charge.
2846199
Does not hold a charge for as long as you think.  Was not enough to charge a Motorola HD MAX cell phone.
622909
Bought the battery with high hopes. Thought it was a bargain compared to price of the Seido.
At time of replacement my stock battery was getting about 8hrs of use. This battery initially was getting me about 12-14 hrs of run time.  (kids, games, constant email checking etc.  Now after about 6 months of use this battery is only holding charge for about 6-8 hours and if the kids get a hold of it for games it can be drained within about 4 hours.  Have had a few situations where the charger couldn't outpace the drain, and had to turn the device off to charge up to functionality.

So time for a new battery!
3963503
Not impressed.  Poor battery life. It's something i like to keep on my dog because you never know when you'll actually need it. My old collar could go days without getting charged that isn't the case for this one.  We have only used it a handful of times since purchase for this very reason. Defeats the purpose of having the collar if it's not holding a charge long enough to actually use it.
3838366
Doesn't charge while you're using it and it takes about 8 hours to charge half way. Not worth it.
3118992
It started out okay, but after a few months it won't hold a charge for very long at all. Playing music over a bluetooth, screen off, and the battery will go down 10% in 20 minutes. I've gone from 100% to 40% in less than an hour if I'm online looking at Facebook or anything with my screen on.  Overnight, not plugged in, not in use will drop anywhere from 20-30%.
2197480
It does not hold a charge for more than 5 to 10 minutes max. I tried charging it numerous times 2-3 hrs at a time. I even tried to lugh try clamp the magnetic charger to the port for a better connection to no avail. Felt decent when fired up but unfortunately faded quickly. I was initially curious when I saw the high review rating only to realize after reading the reviews that the vast majority of reviewers received their product at a big discount or got it for free for their unbiased opinion. And I use the word unbiased loosely.
3152401
Does not hold its charge.  Last a min then it dies.  Dealt with two of their product 14.4v and 15.6v and both did not hold its charge.
4922447
The battery does not last long enough. I have to charge it as often as I do my cell phone.
2162568
Cheaply made guess that's what you get for paying $35.00. Doesn't hold a charge and works when it wants too.
3460612
I've had this for a few months. It only charges my iPhone6 ~60% before it dies. I closed all apps and left my phone idle during the charging period to see what the max recharge was. Money is better spend on an external battery pack. I like the fit on the phone.
465380
It's a piece of junk.  I bought this in August, 2014 and in March of 2015 it won't hold a charge.  Worked for 7 months, however I noticed it losing it's charge even before that.  It's plugged in all the time and when I try to use it, the charge lasts about two minutes.  Will have to throw it out and get a different brand.
2864389
It does not last what it claims to last. The mAh are just a hook . No extra duration and battery started to last less and less in a month.
4524256
First, the item arrived on time and the packaging was fine.

The item itself looked fine.  However, it won't hold a charge and it is difficult to navigate in the menu options.  We had the item less than 24 hours before it stopped working.  The reviews are right.  Spend a bit more and get something that works.  Have this one boxed up and ready to send back today.
4561631
Barely holds a charge. I never leave it on when I'm not using it, I use it no more than 30 minutes per day (usually less) and it needs to be charged at least a few times a week.
3336912
Item does not hold charge for very long.  Spend more time charging charger than I do charging my phone.
4263635
This thing doesn't hold a charge...if I fully charge it the next day it has to be charged again. I'm glad that I checked it before I took it on a ride and had to rely on it.