--- product_id: 532380970 title: "21V 4.0AH Battery With Electric Quantity Display" brand: "shintyool" price: "NZ$126" currency: NZD in_stock: true category: "Shintyool" url: https://www.desertcart.nz/products/532380970-21v-4-0ah-battery-with-electric-quantity-display store_origin: NZ region: New Zealand --- # 4000mAh High Capacity 4-LED Battery Indicator 21V Lithium Power 21V 4.0AH Battery With Electric Quantity Display **Brand:** shintyool **Price:** NZ$126 **Availability:** ✅ In Stock ## Summary > 🔋 Power up your productivity with smart, safe, and sleek energy! ## Quick Answers - **What is this?** 21V 4.0AH Battery With Electric Quantity Display by shintyool - **How much does it cost?** NZ$126 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/532380970-21v-4-0ah-battery-with-electric-quantity-display) ## 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 - • **Stay In The Know:** 4-LED electric quantity display keeps you informed—never get caught off guard mid-task. - • **Power Meets Precision:** 21V lithium-ion cells deliver consistent, long-lasting energy for your toughest jobs. - • **Built-In Safety Shield:** Multi-protect system guards against overload, overheating, and over-discharge for peace of mind. - • **Compatible & Confident:** Works seamlessly with major power tool brands—reach out to confirm your model and avoid purchase mistakes. - • **Universal Charging Ease:** Supports 100-240V input with flame-retardant charger and clear LED charging status. ## Overview The SHINTYOOL 21V 4.0Ah lithium-ion battery offers robust power and smart features including a 4-LED fuel gauge and multi-protection safety system. Compatible with a wide range of major power tool brands, it comes with a universal charger supporting 100-240V input and a flame-retardant shell. Designed for professionals who demand reliability and real-time battery status, this rechargeable battery weighs just 9 ounces and includes a 1-year warranty. ## Description Buy SHINTYOOL 21V Lithium Battery with Electric Quantity Display, 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower and Mini Saw: Battery Packs - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## 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, flame retardant shell, 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 A | | Antenna Location | Power Tool | | Battery Capacity | 4000 milliamp_hours | | Battery Cell Type | Lithium Ion | | Battery Weight | 1.4 pounds | | Best Sellers Rank | #76,768 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #772 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 4.5 out of 5 stars (320) | | 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) | | Reusability | Rechargeable | | Unit Count | 1 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 4.0AH Battery With Electric Quantity Display - Image 1](https://m.media-amazon.com/images/I/61CR85EalrL.jpg) ## 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.nz/products/532380970-21v-4-0ah-battery-with-electric-quantity-display](https://www.desertcart.nz/products/532380970-21v-4-0ah-battery-with-electric-quantity-display) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-07-27*