--- product_id: 96937689 title: "iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries." brand: "zentec" price: "฿5498" currency: THB in_stock: false category: "Electronics" url: https://www.desertcart.co.th/products/96937689-ijoy-21700-battery-3750-mah-40-a-3-7-v store_origin: TH region: Thailand --- # iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. **Brand:** zentec **Price:** ฿5498 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. by zentec - **How much does it cost?** ฿5498 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/96937689-ijoy-21700-battery-3750-mah-40-a-3-7-v) ## Best For - zentec enthusiasts ## Why This Product - Trusted zentec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Colour Name:3 Items Original product from the factory. This high-performance battery by iJoy has a flat top positive pole and does not have integrated protection electronics/protective circuit. The batteries occupy a low internal resistance and an extra-high capacity. This makes them ideal for e-shishas, e-cigarettes, RC model making and power tools. The iJoy 21700 is a Li-ion battery, which is considered thermally stable and subject to only a low memory effect. Technical data: Capacity typical: 3750 mAh Minimum capacity: 3700 mAh. Voltage: 3.6 - 3.7 V Maximum constant discharge current: 40A. Protection circuit: no. Positive pole design: flat Manufacturer: iJoy Diameter: 21.4 mm ± 0.15 mm. Height: 70.1 mm ± 0.3 mm. Weight: 63.5 g ± 1 mm. Charging closing voltage: 4.2 V. Discharge voltage: 2.5 A. Internal resistance: 15 mOhm. Safety instructions for lithium cells. This is a lithium cell that can only be operated with protective electronics. Please note that lithium cells can only be used by authorised professionals. If used incorrectly, this can lead to fire development or explosion. ## Features - Original product from IJOY! - This powerful battery from iJoy has a flat top positive pole and does not have an integrated protective electronics/protective circuit. The batteries have a low internal resistance and an extra high capacity. Thus they are ideal for e-shishas, e-cigarettes, RC model making and power tools. - The iJoy 21700 is a Li-Ion battery, these are considered thermally stable and are subject to only a low memory effect. - Technical data: capacity typical: 3750 mAh / capacity minimum: 3700 mAh / voltage: 3.6 - 3.7 V / maximum constant discharge current: 40 A / protection circuit: no / design positive pole: flat / manufacturer: iJoy / diameter: 21.4 mm ± 0.15 mm / height: 70.1 mm ± 0.3 mm / weight: 63.5 g ± 1 mm / charging voltage: 4.2 V / discharge voltage: 152.5 A - Safety instructions for lithium cells. This is a lithium cell and can only be operated with protective electronics. Please note that lithium cells may only be used by authorised personnel. Incorrect handling and/or use may lead to fire development or explosion. ## Images ![iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. - Image 1](https://images-na.ssl-images-amazon.com/images/I/51c4LO9kbXL.jpg) ![iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. - Image 2](https://images-na.ssl-images-amazon.com/images/I/515w7cw9TfL.jpg) ![iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. - Image 3](https://images-na.ssl-images-amazon.com/images/I/41VzhZX0J4L.jpg) ![iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. - Image 4](https://images-na.ssl-images-amazon.com/images/I/41KVF5hmhmL.jpg) ![iJoy 21700 Battery 3750 mAh 40 A 3.7 V High Performance Battery Flat Top Ideal for sub-ohm, steam, RC model building and powertool batteries. - Image 5](https://images-na.ssl-images-amazon.com/images/I/41oW%2BYT0zRL.jpg) --- ## 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.th/products/96937689-ijoy-21700-battery-3750-mah-40-a-3-7-v](https://www.desertcart.co.th/products/96937689-ijoy-21700-battery-3750-mah-40-a-3-7-v) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-06-04*