# Battery for Samsung Galaxy S21 (model G991B) — Replacement phone battery

**URL:** https://aio.lv/en/product--samsung-g991b-s21-battery--11865469
**Data updated:** 2026-03-09 17:42 (EET)
**Category:** Portable Device Batteries
**Manufacturer:** Samsung
**Manufacturer code:** G991B S21 Battery
**EAN:** 5704174383062
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--samsung-g991b-s21-battery--11865469

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.07.2026 | free |
| Pickup points | 03.08.2026 | 1.89 EUR |
| Courier delivery to door | 03.08.2026 | 4.99 EUR |

## Summary description

Replacement internal battery compatible with Samsung Galaxy S21 (model G991B). Designed as a direct-fit phone battery for restoring device power, supporting standard charging and discharging functions. Suitable for repairs and battery replacements to resolve reduced runtime, unexpected shutdowns or charging issues. Intended for qualified technicians or experienced users performing handset servicing.

## Long description

This replacement internal battery is compatible with Samsung Galaxy S21 (model G991B) and designed as a direct-fit phone battery to restore device power and normal operation. It supports standard charging and discharging functions and is intended for use in repair and maintenance of handsets that experience reduced runtime, unexpected shutdowns or charging issues. The component is intended for installation by qualified technicians or experienced users familiar with handset servicing and safe battery handling.
Advantages
The battery provides a like-for-like replacement that preserves the original form factor and connector layout, enabling a straightforward swap without modifying the device. It restores usable runtime and charging stability for devices that have degraded performance due to aged or damaged cells. The part is designed to meet the mechanical and electrical fit requirements for the Samsung Galaxy S21 (model G991B), supporting standard charging protocols and allowing the phone to operate with its original charging accessories.
Suitable for
Repairing Samsung Galaxy S21 (model G991B) with reduced battery capacity
Replacing swollen or damaged batteries to eliminate safety risks
Resolving unexpected shutdowns or rapid discharge issues
Professional handset servicing and component-level refurbishment
Experienced users performing a battery replacement at home
Key specifications
Compatibility: designed for Samsung Galaxy S21 (model G991B)
Function: internal rechargeable lithium-ion battery for smartphone use
Form factor: direct-fit replacement chassis and connector alignment
Charging compatibility: supports standard device charging and power management
Intended use: replacement for degraded, damaged or worn original battery
How to use
Before installation, power off the phone and disconnect any external chargers or cables. Follow manufacturer-recommended disassembly procedures for the Samsung Galaxy S21 (G991B), using appropriate tools to access the internal battery compartment and avoiding damage to the display, cables and internal components. Remove the old battery carefully, disconnecting the battery connector and any adhesive securing the cell, then install the replacement battery by aligning the connector and reconnecting it securely. Reassemble the device, ensuring all seals and screws are returned to their original positions. After reassembly, charge the phone to full capacity before normal use to allow the device to calibrate battery level reporting.
Usage recommendations
Use this battery only for the specified Samsung Galaxy S21 (model G991B). Handle lithium-ion batteries with care: avoid puncturing, bending or exposing the cell to high temperatures. Use manufacturer-approved chargers and cables, and dispose of the replaced battery according to local electronic waste regulations. If you are not experienced with phone repairs, seek professional installation to ensure safe replacement and proper functionality.

## FAQ

### How much does the Battery Samsung Galaxy S21 G991B cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 29.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Samsung products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Samsung service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11865469/67266929_large.webp