--- product_id: 526911845 title: "Galaxy S21 Battery, (Upgraded) 4500mAh 3.85V Li-Polymer Replacement Battery EB-BG991ABY for Samsung Galaxy S21 SM-G991U1 with Repair Tool Kit" brand: "maxbear" price: "26313CFA" currency: XOF in_stock: false reviews_count: 8 category: "Maxbear" url: https://www.desertcart.sn/products/526911845-galaxy-s21-battery-upgraded-4500mah-3-85v-li-polymer-replacement store_origin: SN region: Senegal --- # 3.85V stable voltage output 4500mAh high capacity Built-in microchip for safety Galaxy S21 Battery, (Upgraded) 4500mAh 3.85V Li-Polymer Replacement Battery EB-BG991ABY for Samsung Galaxy S21 SM-G991U1 with Repair Tool Kit **Brand:** maxbear **Price:** 26313CFA **Availability:** ❌ Out of Stock ## Summary > 🔋 Recharge your Galaxy S21’s soul — don’t let low battery slow your hustle! ## Quick Answers - **What is this?** Galaxy S21 Battery, (Upgraded) 4500mAh 3.85V Li-Polymer Replacement Battery EB-BG991ABY for Samsung Galaxy S21 SM-G991U1 with Repair Tool Kit by maxbear - **How much does it cost?** 26313CFA with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/526911845-galaxy-s21-battery-upgraded-4500mah-3-85v-li-polymer-replacement) ## Best For - maxbear enthusiasts ## Why This Product - Trusted maxbear brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power Up Like New:** Restore your Galaxy S21’s battery life with a premium 4500mAh capacity for all-day productivity. - • **Safe & Smart Charging:** Advanced microchip technology prevents overcharging, overheating, and over-discharging to extend battery lifespan. - • **Precision Compatibility:** Specifically engineered for Samsung Galaxy S21 SM-G991U1, ensuring perfect fit and optimal performance. - • **Confidence in Every Charge:** Backed by a 12-month warranty and dedicated customer support for worry-free installation and use. - • **Certified Quality Assurance:** CE, ROHS, and UL certifications guarantee a reliable and durable replacement battery you can trust. ## Overview The MAXBEAR Galaxy S21 Replacement Battery offers a robust 4500mAh capacity with a stable 3.85V output, designed exclusively for the Samsung Galaxy S21 SM-G991U1. Crafted from premium grade A lithium polymer cells and equipped with a built-in microchip, it safeguards against overcharging, overheating, and over-discharging. Certified by CE, ROHS, and UL standards, this battery promises durability and safety, backed by a 12-month warranty to keep your device powered and your peace of mind intact. ## Description Product Specifications - Battery Capacity: 4,500 mAh - Battery Type: Lithium Ion Polymern - Voltage Output: 3.85 V - Watt-hour: 17.32 Wh COMPATIBLE MODELS -Samsung Galaxy S21 5G -SM-G991U1 -EB-BG991ABY Package Includes: -Replacement Battery for Samsung Galaxy S21 x 1 pcs. -12 Month Warranty Internal batteries, (IE: Phone replacement batteries), require technical knowledge to replace, and may be hazardous and/or cause damage or future damage to phone if done incorrectly. Do not expose to extreme temperatures, below 0F - above 140F. Never charge battery for longer than 24 hours. DISCLAIMER: (Must read and acknowledge before buying) Opening up your device to perform a modification or repair may void your warranty if applicable. Review: Unable to test due to my own failure - I messed up the repair and broke the phone myself so giving a automatic 5 stars as I was unable to test the product. No fault to the product though it was my fault for sure! Review: Good replacement. Need to get adhesive for after installation - Works well and fits. Just wish that there was new adhesive that came with it. My phone is in a case so it's not a big deal but the backplate comes off easily now cause the adhesive isn't there anymore. ## Features - 🌺【Brand New Battery 】: MAXBEAR Replacement battery for Samsung Galaxy S21 , bring life back to your phone with a replacement battery. Make your phone acting like a brand new - 🌺【Top Quality Battery】: Made of grade A premium battery cells, long lasting and durable. Build-in microchip to prevent over-charging, over-discharging and over-heating, which will help lengthen battery life. STRICT QUALITY-CONTROL. CE, ROHS and UL certified. Long battery life cycle - 🌺【Compatible Models】: Compatible with Samsung Galaxy S21Only, Model : EB-BG991ABY, [Note: Not for Samsung Galaxy S21 Plus or other Galaxy model.] - 🌺【Spare Battery Specs】: Galaxy S21 Replacement battery has a capacity of 4500mAh. The Battery type is Lithium Ion, the Voltage is 3.85V. - 🌺【Customer Satisfaction】: 12 Months Warranty for customer satisfaction guaranteed, Pls contact us if you have any questions. Customer satisfaction is our highest priority. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09YTBGK9C | | Batteries | 1 Lithium Polymer batteries required. | | Best Sellers Rank | #67,990 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #505 in Cell Phone Replacement Batteries | | Customer Reviews | 4.0 4.0 out of 5 stars (65) | | Date First Available | May 10, 2021 | | Item Weight | 1.6 ounces | | Item model number | YY18RB | | Manufacturer | MAXBEAR | | Package Dimensions | 6 x 5 x 1 inches | ## Product Details - **Battery Capacity:** 4500 Milliamp Hours - **Battery Cell Composition:** Lithium Polymer - **Brand:** MAXBEAR - **Number of Batteries:** 1 Lithium Polymer batteries required. - **Recommended Uses For Product:** Phone ## Images ![Galaxy S21 Battery, (Upgraded) 4500mAh 3.85V Li-Polymer Replacement Battery EB-BG991ABY for Samsung Galaxy S21 SM-G991U1 with Repair Tool Kit - Image 1](https://m.media-amazon.com/images/I/71xQIpD2gOL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Unable to test due to my own failure *by J***D on June 30, 2025* I messed up the repair and broke the phone myself so giving a automatic 5 stars as I was unable to test the product. No fault to the product though it was my fault for sure! ### ⭐⭐⭐⭐ Good replacement. Need to get adhesive for after installation *by A***N on June 14, 2025* Works well and fits. Just wish that there was new adhesive that came with it. My phone is in a case so it's not a big deal but the backplate comes off easily now cause the adhesive isn't there anymore. ### ⭐⭐⭐⭐⭐ Battery *by P***D on January 11, 2026* This was a life saver didn't have the money for a new phone and the battery worked perfect. Would buy again. ## Frequently Bought Together - MAXBEAR Galaxy S21 Battery, (Upgraded) 4500mAh 3.85V Li-Polymer Replacement Battery EB-BG991ABY for Samsung Galaxy S21 SM-G991U1 with Repair Tool Kit - PHONSUN Pre-Cut Back Battery Door Cover Adhesive Double Sided Tape Glue Replacement for Samsung Galaxy S21 5G SM-G991U G991U1 G991 (Pack of 2) - Galaxy s21 Replacement Charging USB Port Board Parts for Samsung Galaxy s21 (5G) SM-G991W SM-G991U 6.2 Inches (not fit fot s21 Plus Version) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/526911845-galaxy-s21-battery-upgraded-4500mah-3-85v-li-polymer-replacement](https://www.desertcart.sn/products/526911845-galaxy-s21-battery-upgraded-4500mah-3-85v-li-polymer-replacement) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-06-05*