21v Lithium Battery - 4.0 Ah Battery with Charger Adapter Led Indicator Compatible with Leaf Blower
Condition: New
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- – 4-month term
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Monday, Jul 6
Size: 4.0 AH
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.
- ChargerSupport 100-240v universal standard ac input voltage.1a power adapter,us plug,led indicator to easily see the charging situation.
- Multi-Protect Safety SystemThis battery is equipped with overload protection, overheat protection & over-discharge protection.
- Note on BatteryIn 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.
- WEVE 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).
Number of Batteries: 1 Lithium Ion batteries required.
Brand: SHINTYOOL
Battery Cell Composition: Lithium
Battery Capacity: 4 Amp Hours
Recommended Uses For Product: Power Tool
Number of Batteries: 1 Lithium Ion batteries required.
Brand: SHINTYOOL
Model Number: INR18650 2000mAh-5C
Manufacturer: SHINTYOOL
Warranty Description: 1 yera
Antenna Location: Power Tool
Battery Capacity: 4 Amp Hours
Voltage: 21
Reusability: Rechargeable
Amperage: 1 Amps
Compatible Phone Models: For ALLOYMAN, Aoben, seesill, EWORK, Inquire to learn more about compatible brands.
Unit Count: 1.0 Count
Battery Weight: 20 Ounces
Item Weight: 9 Ounces
Battery Cell Type: Lithium
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Jul 6
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: 4.0 AH
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.
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Reviewed in the United States on October 6, 2025 by Richard Fletcher
Size: 4.0 AH
This 21v lithium battery works perfectly and provides strong, consistent power. The 4.0Ah capacity gives a long runtime, which is great for extended use with my tools. It charges quickly and holds the charge well without draining fast. The build quality feels solid and durable. A great replacement or backup battery that delivers excellent performance at a good price. Highly recommended.
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Reviewed in the United States on September 24, 2025 by luis yomir
Size: 4.0 AH
A perfect and cost effective battery replacement for my Black & Decker hedge trimmer. Fit perfectly, charged quickly and had a solid 45 minutes usage time.
Reviewed in the United States on May 23, 2026 by Dennis M. Yohe
Size: 4.0 AH
It seems strong. Have only used once and worked well. Little expensive.
Reviewed in the United States on May 20, 2026 by g h
Size: 4.0 AH
The seller wants a review. I haven’t used it yet so I don’t know how long it will last on a charge. It doesn’t have the bar to show where the charge is like my original ones do. No battery indicator that I can see. This is bigger so hoping it will last longer. The important thing is that it fit in the item I bought it for.
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Reviewed in the United States on May 8, 2026 by Sarah E Woitt
Size: 4.0 AH
I’ve had one for about two years now. Still holds a good charge. Use it often.
Reviewed in the United States on May 17, 2026 by Craig.
Size: 4.0 AH
Worse the 1 star. I used the battery once in December. Pulled it back out to use for yard stuff. Doesn't hold a charge, cant even get it to charge. The plug is green but I put it in my machine and there's nothing
Reviewed in the United States on May 4, 2026 by K
Size: 4.0 AH
Works perfectly. Very powerful.
Reviewed in the United States on January 29, 2026 by Stevepicker