--- product_id: 532380970 title: "21V Lithium Battery With Electric Quantity Display 4.0AH" brand: "shintyool" price: "R1398" currency: ZAR in_stock: true reviews_count: 10 category: "Shintyool" url: https://www.desertcart.co.za/products/532380970-21v-lithium-battery-with-electric-quantity-display-4-0ah store_origin: ZA region: South Africa --- # 4.0 Ah High Capacity 21V Lithium Power Universal Charger with LED 21V Lithium Battery With Electric Quantity Display 4.0AH **Brand:** shintyool **Price:** R1398 **Availability:** ✅ In Stock ## Summary > 🔋 Power up your productivity—never get caught powerless again! ## Quick Answers - **What is this?** 21V Lithium Battery With Electric Quantity Display 4.0AH by shintyool - **How much does it cost?** R1398 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/532380970-21v-lithium-battery-with-electric-quantity-display-4-0ah) ## Best For - shintyool enthusiasts ## Why This Product - Trusted shintyool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Multi-protect system guards against overload, overheating, and over-discharge for worry-free use. - • **Power That Lasts:** 4000mAh capacity fuels your tools longer, so you never miss a beat on the job. - • **Smart Battery Display:** 4-LED electric quantity indicator keeps you in control—know your power status at a glance. - • **Universal Compatibility:** Works seamlessly with major brands and popular models—expand your toolkit without limits. - • **Fast & Convenient Charging:** Universal 100-240V adapter with LED indicator ensures quick, hassle-free power-ups anywhere. ## Overview The SHINTYOOL 21V Lithium Battery delivers a robust 4.0 Ah capacity with a smart LED power display, compatible with a wide range of power tools including leaf blowers and mini saws. Featuring a universal charger and advanced safety protections, it ensures reliable, long-lasting performance for professionals who demand efficiency and peace of mind. ## Description Product description A Great Gift Idea For Dad, Mom, Husband, Friends And Family, Suitable For Everyone Who Needs It, Whether You Are A Professional Or An Average Person. Any Non-human Damage Or Any Reason You Are Not Completely Satisfied With Our Product, We Will Immediately Provide You Replace Your Item. Type: 4.0AH Battery Type: Battery power adapter How to install battery Step 1: Hold the machine firmly with one hand. Push down the battery unlock button located on the rear side of the battery with the other hand. Step 2: Keep pushing the unlock button down and slide the battery backward out of the machine. Step 3: You made it. Note： 1. Do not try to open the battery. 2. Protect the battery against continuous intense sunlight, fire, water, and moisture. 3. Do not damage the battery with sharp objects. 4. Do not discard this product at will. 5. Overcharging the device will reduce the life of the battery, unplug it from the charger in time to avoid overcharging. 6. If the battery does not last 10 minutes, it may be caused by overheating. Please wait for 5 minutes for the battery to cool down. Please read the following notes on battery maintenance carefully After receiving the product, please fully charge the battery before using it. In order to protect the battery, please do not charge the battery for a long time. The best time to charge is not more than 6 hours. Please do not charge the battery all night, it will seriously damage the battery life. Always remove battery pack from your tool when you are assembling parts,making adjustments,cleaning,or when not being used for an extended time. Do not leave the battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks. Review: Charger and two batteries great find! - Arrived on time. I fully charged both batteries. Using one now and it works fine! Reasonably priced for 2+ charger. Review: Nice fit. - Ordered this to be a second battery for my impact I bought here on desertcart awhile back, but I could not find that impact brand here anymore. I was hesitant at first, but when I received it it fit like a glove and works well. Charged pretty fast too and has the power I needed. The correct mAh I was looking for too. ## Features - ★【Compatible with More 】Our batteries are compatible with some major brands, for power tools bl1860b bl1850 bl1840 bl1850b-2 bl1845 bl1830 bl1820 bl1815 lxt-400 series please feel free to contact us for more model information. - ★【21 Volt Lithium Battery 】Battery voltage: 21v, capacity: 4000ah, type: lithium ion, made of 10 pcs quality lithium ion battery,4 LED fuel gauge power display,battery light won't light up unless you will press the battery button, in order to reduce battery. - ★【Charger】Support 100-240v universal standard ac input voltage. 1a power adapter,us plug,led indicator to easily see the charging situation. - ★【Multi-Protect Safety System】This battery is equipped with overload protection, overheat protection & over-discharge protection. - ★【Note on Battery】In order to protect the battery, please do not charge more than 6 hours.Note: Please Fully charge the battery before its first use. Please do not charge the battery for overnight since it will badly damage the battery life. - ★【WE’VE GOT YOU COVERED】 Any Non-human Damage Or Any Reason You Are Not Completely Satisfied With Our Product, We Will Immediately Provide You A Full Refund ( Or Replace Your Item). - ★Note: Our 21v battery is very similar to another 21v III battery, but the compatible tools and brands are different, please do not confuse and make a wrong purchase. Feel free to inquire to learn more. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B64631SL | | Amperage | 1 Amps | | Antenna Location | Power Tool | | Battery Capacity | 4000 Milliamp Hours | | Battery Cell Composition | Lithium Ion | | Battery Cell Type | Lithium Ion | | Battery Weight | 1.4 Pounds | | Best Sellers Rank | #96,950 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,180 in Cordless Tool Battery Packs | | Brand | SHINTYOOL | | Built-In Media | Battery with Charger Adapter | | Compatible Phone Models | Compatible: For ALLOYMAN, Aoben, seesill, AVHRIT, Inquire to learn more about compatible brands. | | Customer Reviews | 4.5 out of 5 stars 311 Reviews | | Item Dimensions | 4.7 x 3 x 2.8 inches | | Item Weight | 9 Ounces | | Manufacturer | SHINTYOOL | | Model Name | bl1820 | | Model Number | B5503 | | Number of Batteries | 1 AAAA batteries required. (included) | | Recommended Uses For Product | Power Tool | | Reusability | Rechargeable | | Unit Count | 1.0 Count | | Voltage | 21 Volts | | Warranty Description | 1 yera | ## Product Details - **Battery Capacity:** 4000 Milliamp Hours - **Battery Cell Composition:** Lithium Ion - **Brand:** SHINTYOOL - **Number of Batteries:** 1 AAAA batteries required. (included) - **Recommended Uses For Product:** Power Tool ## Images ![21V Lithium Battery With Electric Quantity Display 4.0AH - Image 1](https://m.media-amazon.com/images/I/61CR85EalrL.jpg) ![21V Lithium Battery With Electric Quantity Display 4.0AH - Image 2](https://m.media-amazon.com/images/I/71XVwnOeTbL.jpg) ![21V Lithium Battery With Electric Quantity Display 4.0AH - Image 3](https://m.media-amazon.com/images/I/713y-Ap6QyL.jpg) ![21V Lithium Battery With Electric Quantity Display 4.0AH - Image 4](https://m.media-amazon.com/images/I/71bNSVacKML.jpg) ![21V Lithium Battery With Electric Quantity Display 4.0AH - Image 5](https://m.media-amazon.com/images/I/61z1GC24tZL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Charger and two batteries great find! *by F***. on April 9, 2026* Arrived on time. I fully charged both batteries. Using one now and it works fine! Reasonably priced for 2+ charger. ### ⭐⭐⭐⭐⭐ Nice fit. *by S***T on November 21, 2025* Ordered this to be a second battery for my impact I bought here on Amazon awhile back, but I could not find that impact brand here anymore. I was hesitant at first, but when I received it it fit like a glove and works well. Charged pretty fast too and has the power I needed. The correct mAh I was looking for too. ### ⭐⭐⭐⭐⭐ Did what I needed it to do. *by T***N on June 27, 2025* Bought for a small battery operated chain saw. Worked great. Came fully charged and lasted longer than the original battery. ## Frequently Bought Together - SHINTYOOL 21V Lithium Battery with Electric Quantity Display, 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower and Mini Saw - SHINTYOOL 21V Single Port Rapid Charger Base, Fast Charger for 21V Lithium-Ion Battery (Battery Not Included) - SHINTYOOL 21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower --- ## 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.co.za/products/532380970-21v-lithium-battery-with-electric-quantity-display-4-0ah](https://www.desertcart.co.za/products/532380970-21v-lithium-battery-with-electric-quantity-display-4-0ah) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-05-27*