--- product_id: 554239933 title: "21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower" brand: "shintyool" price: "S$119" currency: SGD in_stock: true reviews_count: 5 category: "Shintyool" url: https://www.desertcart.sg/products/554239933-21v-lithium-battery-4-0-ah-battery-with-charger-adapter store_origin: SG region: Singapore --- # 4.0 Ah High Capacity 21V Lithium Power Universal 100-240V Charger 21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower **Brand:** shintyool **Price:** S$119 **Availability:** ✅ In Stock ## Summary > 🔋 Power your productivity, never miss a beat! ## Quick Answers - **What is this?** 21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower by shintyool - **How much does it cost?** S$119 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/554239933-21v-lithium-battery-4-0-ah-battery-with-charger-adapter) ## 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 - • **Long-Lasting Charge:** 4.0 Ah capacity ensures extended runtime so you can finish your tasks without constant recharging. - • **Power Up Like a Pro:** 21V lithium-ion battery delivers consistent, high-performance energy for your leaf blower and compatible power tools. - • **Safety First, Always:** Multi-protect system guards against overload, overheating, and over-discharge for worry-free operation. - • **Plug & Play Compatibility:** Works seamlessly with major brands including Makita LXT series, making upgrades effortless and future-proof. - • **Smart Charging, No Guesswork:** LED indicator on the charger keeps you informed of charging status, preventing overcharge and extending battery life. ## Overview This 21V 4.0 Ah lithium-ion battery from SHINTYOOL offers reliable, long-lasting power for leaf blowers and compatible power tools. Featuring a universal 100-240V charger with LED indicator and advanced multi-protection safety system, it ensures efficient charging and safe operation. Compatible with major brands like Makita LXT series, it’s designed for professionals who demand performance and durability in their cordless tools. ## Description Specifications:Type: Battery Rated Voltage: 21VPower Input: 400WCharger Input:110V, 50Hz-60HzNumber of Batteries:1Cells Per Batter: 10Battery Weight : 20 OZSpecification:Type: Battery power adapterMaterial: ABSPlug type: USInput voltage: 110-240V 50HZ/60HZInterface: about 5.5*2.5mm/0.2*0.1inOutput current: 1AWeight: 9 OZ 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.Battery Maintenance:Please read the following notes on battery maintenance carefullyAfter 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.How to install batteryStep 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 Review: Muy bueno - Muy bueno Review: SHINTYOOL 21v 4.0 Ah Battery: A Perfect, Powerful Replacement for Off-Brand Tools! - I received the SHINTYOOL 21v Lithium Battery with Charger Adapter (4.0 Ah), and I am genuinely impressed. I took a chance hoping this would be a compatible solution for my slightly older, off-brand 21v cordless leaf blower—and it was a perfect fit! Finding reliable battery replacements for generic or lesser-known tool brands can be a nightmare, but this SHINTYOOL battery snapped into place smoothly, instantly reviving my leaf blower. The 4.0 Ah capacity is a significant upgrade over my original battery, providing a noticeable increase in run time. I was able to clear my entire yard without needing a recharge, which was never possible before. The accompanying charger works quickly and efficiently, and the built-in LED indicator on the battery itself is incredibly useful for quickly gauging the remaining charge without having to plug it into the tool or charger. This battery delivers consistent, strong performance and proves you don't always need to buy the expensive OEM part for quality power. If you have an off-brand 21v tool, give this battery a try—it's a high-quality, high-capacity solution. Pros: Perfect fit and compatibility with generic 21v tools. 4.0 Ah capacity delivers excellent, long-lasting run time. Reliable and fast charging. Clear LED indicator for checking battery life. ## 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,can provide stable capacity and output. - ★【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). ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BF9DBLC2 | | Amperage | 1 Amps | | Antenna Location | Power Tool | | Battery Capacity | 4 Amp Hours | | Battery Cell Type | Lithium Ion | | Battery capacity | 4 Amp Hours | | Battery cell composition | Lithium Ion | | Best Sellers Rank | #65,825 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #197 in Cordless Tool Accessories | | Brand | SHINTYOOL | | Compatible Phone Models | Makita | | Customer Reviews | 4.5 out of 5 stars 1,272 Reviews | | Item Weight | 9 Ounces | | Manufacturer | SHINTYOOL | | Model Number | 4.0AH | | Number of Batteries | 1 Lithium Ion batteries required. | | Number of batteries | 1 Lithium Ion batteries required. | | Recommended uses for product | Power Tool | | Reusability | Rechargeable | | Unit Count | 1 Count | | Unit count | 1 Count | | Voltage | 21 | ## Product Details - **Battery capacity:** 4 Amp Hours - **Battery cell composition:** Lithium Ion - **Brand:** SHINTYOOL - **Number of batteries:** 1 Lithium Ion batteries required. - **Unit count:** 1 Count ## Images ![21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower - Image 1](https://m.media-amazon.com/images/I/61oXd+D0MgL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Muy bueno *by A***Z on 19 August 2026* Muy bueno ### ⭐⭐⭐⭐⭐ SHINTYOOL 21v 4.0 Ah Battery: A Perfect, Powerful Replacement for Off-Brand Tools! *by R***R on 6 October 2025* I received the SHINTYOOL 21v Lithium Battery with Charger Adapter (4.0 Ah), and I am genuinely impressed. I took a chance hoping this would be a compatible solution for my slightly older, off-brand 21v cordless leaf blower—and it was a perfect fit! Finding reliable battery replacements for generic or lesser-known tool brands can be a nightmare, but this SHINTYOOL battery snapped into place smoothly, instantly reviving my leaf blower. The 4.0 Ah capacity is a significant upgrade over my original battery, providing a noticeable increase in run time. I was able to clear my entire yard without needing a recharge, which was never possible before. The accompanying charger works quickly and efficiently, and the built-in LED indicator on the battery itself is incredibly useful for quickly gauging the remaining charge without having to plug it into the tool or charger. This battery delivers consistent, strong performance and proves you don't always need to buy the expensive OEM part for quality power. If you have an off-brand 21v tool, give this battery a try—it's a high-quality, high-capacity solution. Pros: Perfect fit and compatibility with generic 21v tools. 4.0 Ah capacity delivers excellent, long-lasting run time. Reliable and fast charging. Clear LED indicator for checking battery life. ### ⭐⭐⭐⭐⭐ Charged and ready to work! *by T***N on 21 August 2026* The battery fit my new backpack sprayer. It holds a charge and powers the sprayer perfectly! Great value. ## Frequently Bought Together - SHINTYOOL 21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower - SHINTYOOL 21V Single Port Rapid Charger Base, Fast Charger for 21V Lithium-Ion Battery (Battery Not Included) --- ## 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.sg/products/554239933-21v-lithium-battery-4-0-ah-battery-with-charger-adapter](https://www.desertcart.sg/products/554239933-21v-lithium-battery-4-0-ah-battery-with-charger-adapter) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-23*