Features & Benefits
- 4000mAh 21V battery
- Up to 60 minutes of working time
- Compatible with Seesii Cordless Tool
- Color: n/a
- Material: n/a
- Size: n/a
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- Seesii Upgraded 1PCS 21V 4000mAh Original Rec...
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Item #:
82808421
Seesii Upgraded 1PCS 21V 4000mAh Original Rechargeable Battery
88% of respondents would recommend this to a friend
Item #:
82808421
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Imported from USA store
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Get up to 60 minutes of working time with the 4000mAh 21V battery for Seesii Cordless Tool.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High Capacity
The 21V 4000mAh capacity ensures extended runtime, allowing users to tackle larger projects without interruptions, making it ideal for heavy-duty applications.
Compatibility
Specifically designed for SEESII tools, including impact wrenches and mini chainsaws, this battery provides perfect fit and performance for maximum efficiency and reliability.
Upgraded Performance
This upgraded replacement battery delivers improved power and longevity over standard options, ensuring that tools operate at optimal levels for longer periods, enhancing user experience.
Product Details
| Number of Batteries | 2 Lithium Ion batteries required. (included) |
| Brand | Seesii |
| Model Number | D40 |
| Model Name | T1840-10 |
| Manufacturer | Seesii |
| Included Components | 1*4000mAh Battery |
| Voltage | 18.5 volts |
| Unit Count | 1 Count |
| Battery Weight | 500 g |
| Item Dimensions | 3.94 x 2.36 x 3.15 inches (10 x 6 x 8 cm) |
| Battery Cell Type | Lithium Ion |
| Battery Cell Composition | Lithium Ion |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
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Frequent Tool Users
Ideal for professionals or DIY enthusiasts who rely on powerful tools requiring robust batteries for extended use.
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Outdoor Projects
Great for users engaging in outdoor tasks like gardening or woodworking, where portability and battery life are crucial.
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Power Tool Enthusiasts
Perfect for those who own SEESII tools and want a reliable backup battery to keep projects running smoothly.
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Occasional Users
Not ideal for users who only need power tools sporadically, as it may be an unnecessary expense.
Product Description
Seesii Upgraded 1PCS 21V 4000mAh Original Rechargeable Battery
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Customer Questions & Answers
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Question:
How to Shop Seesii Upgraded 1PCS 21V 4000mAh Original Online From Ubuy?
Answer: It’s easy to shop Seesii Upgraded 1PCS 21V 4000mAh Original online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location. -
Question:
Is Seesii Upgraded 1PCS 21V 4000mAh Original Available to Shop Online in Guernsey?
Answer: Yes, at Ubuy Guernsey this product is available for you to shop at a reasonable price. The Seesii Upgraded 1PCS 21V 4000mAh Original is not available locally but you can trust us with our express shipping services. -
Question:
How Long Does It Take to Get Product After Placing the Order?
Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.
Seesii Battery Packs D40 Editorial Review
Seesii Upgraded 1PCS 21V 4000mAh Original Rechargeable Battery is designed to provide reliable power for your devices, including a fit for the Seesii mini chainsaw and certain impact wrenches. consumers have noted its impressive longevity, with some reporting a usage duration of about a month and a half before needing a recharge. The battery is lightweight at 500 grams and has dimensions that make it easy to handle and install. With its lithium-ion cell composition, it promises durability and efficiency, making it a solid addition to your toolkit. Users appreciate the ease of use, although there are minor concerns about the thump switch color not being consistent.
Customer Reviews & Ratings
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Pros
- Lightweight at only 500 grams
- Fits multiple tools including chainsaws
- Long-lasting charge performance
- Easy to install and use
- Includes 4000mAh capacity
Cons
- Minor concerns about the switch color variation
Platform Trust & Buyer Confidence
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Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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