Battery Case For Galaxy S9 Yicente 4700mAh External Battery Charger Case Portable Extended Battery Charging Case Rechargeable Backup Battery Pack Power Bank Case For Galaxy S9

Yes it does help extend your battery life. Few bad points are that its possibly as heavy as the phone itself so imagine if you will that your doubling the standard weight if your phone? And it's a little annoying that it takes so long to charge your phone even if you haven't used the power stored in the case. It doubles the time to charge your phone. And the power supply from the case to the phone is also supplied as a reduced rate meaning it takes a long time to charge the phone via the case. If you then have to recharge the case and the phone at the same time it will take most of the night to do both at the same time... yikes!

Had this phone case for over 12 months and it was amazin until it broke, my last case was bought from a different company. So I thought I'd buy another and this one unfortunately only charges my phone to about 30% when switched off... it will not charge when switched on I will be requesting a refund.

Unfortunately it broke just after 1month of use. Today as a matter if fax. The case as stopped taking charge. Other than that it was good. As you can see in the picture no lights displayed anymore

+ pos +fits phone securely,can access all key functions2 year warranty, vendor quickly resolved problem- neg -product was faulty, it didn't hold any chargethe case does not have much of a lip around the screen so would offer limited protection of dropped

The pictures on this product are quite misleading, its VERY thick like 4 times thicker than the actual phone. Charges very slow, but does the job? At the cost of making your phone look quite ridiculous

Incredible case that gives and lot back to the phone. Incredibly handy to be out and about and having the phone charging while in your pocket or at your desk without the fuss of cables. The case charges the phone whilst also charging the case which is a useful feature, saving you having to remove the case altogether.Very useful product, it's not uncommon for the base of the product to run hot while charging, it's well within acceptable temperatures. No real downsides to this product, it makes the phone chunky but to me this makes it feel even more sturdy!

Stopped working after 5 months of light usage. Doesn't hold any charge now.When it worked, it was ok, enough to charge from 0% to 100% once.

I bought this for my boyfriend's phone as his charging port wasn't holding charging cables in place, this has totally resolved that issue and has the added bonus of him not needing to charge his phone every night, the only down side is the charging light is very bright so I have to make sure it is out of sight when going to sleep