My Basket

Login or Create an Account

Already registered?

Log in below

What's this?


Checking "Remember Me" will let you access your shopping cart on this computer when you are logged out

New Here?

By creating an account with our store, you will be able to move through the checkout process faster, store multiple shipping addresses, view and track your orders in your account and more.

iPhone 6S High Capacity Battery 2121Mah 20% Extra Life Kit W/ Tools

iPhone 6S High Capacity Battery 2121Mah 20% Extra Life Kit W/ Tools

More Views

  • iPhone 6S High Capacity Battery 2121Mah 20% Extra Life Kit W/ Tools

Need help with this product?

Visit our forum for fast, free, expert advice from Replace Base staff and independent techies.

REPLACEBASE | iPhone 6s High Capacity Replacement Battery 2121mAh - 20% Extra Life - Kit With Tools

A truly high capacity battery for the iPhone 6s, give your phone 20% extra life! Includes tools and adhesive

  • Available: In Stock
  • Product Code: RBSKU6290
  • £12.00 (Ex. VAT)
  • £14.40 (Incl. VAT)
Ask Question
Reward Points You will earn 12 Points for purchasing this product.

Our Replacebase iPhone 6s high capacity battery are made by a leading manufacturers using the latest techniques, Japanese cells and second to none testing processes

They are safety tested to the highest standards and are CE safety certified (unlike many on the market) - they are also RoHS compliant and we are able to provide an MSDS safety sheet if required.

OEM and regular iPhone 6s batteries are rated at 1710mAh, ours are rated at 2121mAh giving you a performance boost of over 20%!

Specifications: 2121mAh (rated, usually a little over!) / 3.82V / 8.1Whr

Compatibility: Apple iPhone 6s

Warranty: 12 Months

Condition: New 

Set includes: 

  • Battery adhesive (the same as the adhesive found in the phone)
  • 2 x triangle tools (1 x fat 1 x thin)
  • Suction cup tool
  • 2 x spudgers (1 x wide 1 x narrow)
  • 2 x screwdrivers (1 x Pentablobe 1 x Philips PH0)


HAZARDOUS GOODS: Li-ion batteries are classed as hazardous items and cant be shipped using many postal services such as Royal Mail. We ship all batteries using an express fully tracked specialist company.

Product Video

6 Review(s)

LV64 Posted on 28/10/2018

My phone was completely useless - the existing battery would last 1hour (iPhone 6s, many years of use). I couldn't justify the new Apple phone prices so took a chance and bought this battery model with 20% extra capacity and was sceptical that it wouldn't be compatible or work well. It works and I am going to say that the performance is amazing. I did do a factory reset on my phone and I did NOT re-instore from backup, to avoid carrying over issues. The battery now easily last 1 whole day. I use phone predominantly on wifi networks for email, web research, strava, spotify, google maps etc. I've been using this battery for 14 days. The other step I have taken is to only recharge on actual Apple plugs/transformers. So save yourself 1000quid (on a new phone) and buy this replacement battery.

Andy Posted on 07/08/2018

Only time will tell if the battery will be ok. But used this company twice and been great. No problems at all and great company to deal with. Would definitely recommend them. Great customer service. I originally ordered for a 6 not a 6s. Sent it back no quibble.

finallycruising Posted on 31/07/2018

I'm not an avid user of my phone, but it was down to less than a day on one charge. With this battery I'm getting more than 3 days of use. Highly recommended. Would be good if there was an option of battery with adhesive but not tools. In order to get the adhesive included I'm amassing quite a collection of tools!

nauman Posted on 13/06/2018

bought about 5 or 6 batteries from eBay that was complete waste of money, tried replacebase battery and well happy, can't be more satisfied, definitely recommended and I'll be using replacebase all the time now

Chris Posted on 13/06/2018

Great upgrade. Battery fits perfectly and is great for my ears as my daughter doesn’t moan about having to charge her phone all the time now.

Sean Posted on 06/03/2018

So far im getting close to 2 days off a charge, defiantly better then my old one and im pretty sure its better then when my phone was new.

Product Questions

Does this battery work with the iPhones battery health software ?

30 Day Return If You're Not Completely Satisfied

12 Month Warranty On Most Items

Customer Support We're Here To Help

European Shipping From Just £2.40