Samsung Galaxy S21 (SM-G991B) Battery (LI-ION Polymer)

If your Samsung Galaxy S21 is shutting down sooner than it used to, this purpose-built replacement battery offers a straightforward way to refresh your phone. It is tailored to the handset so you can regain dependable all-day power. This Ven-Dens replacement sits within the Batteries > Samsung range and is designed to integrate cleanly with the original phone layout.

The cell is engineered for repeat charging cycles, supporting regular top-ups throughout the day while maintaining reliable performance. It is sized to match the original specification so your handset can balance battery life with a slim, comfortable feel. The pack uses a sm-g991b construction selected to balance energy density with safe day-to-day charging behaviour.

During fitment, attention to details such as powering the handset down, lifting components gently and aligning the battery connector correctly will support a successful repair. After installation, a few complete charge cycles help the pack reach its best behaviour.

With the new cell installed, your Samsung Galaxy S21 can return to more predictable battery life for commuting, travelling and relaxing at home. It is a simple way to extend the useful lifespan of the handset you already know and like.

Key Features

• Replacement battery perfectly matches the specifications of your cell phone battery
• Before you repair, discharge your phone battery to 20% and turn off
• During the installation process play attention to the battery connector making sure it aligns precisely with the device
• The new Li-ion polymer battery reaches its best performance after about 3-5 cycles of charging
• Long lasting high capacity battery restores your phone’s performance
• & O CYCLE: High-capacity replacement battery has 30% more power than other batteries giving you more time to use you’re your phone. Brand new O cycle, built to last up to 1000 charging cycles to provide longer battery life
• The new upgraded version is made of Class A high quality batteries with UL, FCC, CE, ISO9001/14001 and RoHS Certificated. Multiple protection features to prevent overcharging and overheating. Built-in microchip to ensure the safety while charging for improved battery life
• 12 months warranty & 30 days refund. If you receive a defective battery, please contact us as soon as possible. We offer replacement or refunds free of charge to ensure a satisfying shopping experience