Features:

Brand new, affordable battery replacement for the iPhone 6s plus 

Regular Capacity:  Version: 2900 mAh

High Capacity:  Version:  3380 mAh

Chemistry: Li-Po

Voltage:  3.82 Volts

Zero Cycle:  basically means the battery has never been used, or, discharged. A battery cycle is one full discharge, followed by one full recharge.

UN DOT 38.3 Certified:  our batteries have been put through extensive testing to ensure a safe, durable and long-lasting lithium-ion battery assembly that can withstand the rigors of transport and wear

Texas Instrument "Gas Gauge" Chip

A Quick-release adhesive is pre-installed

Purchase includes free safe opening pry tool and adhesive

Signs that you should get your battery replaced:

The battery does not hold a charge

Short battery life

Phone performance is slower than normal

Phone shuts off unexpectedly