--- product_id: 641402452 title: "DollaTek 4S 16.8V 40A 18650 Charger PCB Protection Card BMS Lithium Ion Charger Lipo Cell for Motor Drill with Balancer" brand: "dollatek" price: "128.19 DT" currency: TND in_stock: true reviews_count: 5 category: "Dolla Tek" url: https://www.desertcart.tn/products/641402452-dollatek-4s-16-8v-40a-18650-charger-pcb-protection-card store_origin: TN region: Tunisia --- # 40A continuous discharge current 16.8V precise charging voltage Triple-layer battery protection DollaTek 4S 16.8V 40A 18650 Charger PCB Protection Card BMS Lithium Ion Charger Lipo Cell for Motor Drill with Balancer **Brand:** dollatek **Price:** 128.19 DT **Availability:** ✅ In Stock ## Summary > 🛠️ Charge smart, drill harder — power protection that means business! ## Quick Answers - **What is this?** DollaTek 4S 16.8V 40A 18650 Charger PCB Protection Card BMS Lithium Ion Charger Lipo Cell for Motor Drill with Balancer by dollatek - **How much does it cost?** 128.19 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/641402452-dollatek-4s-16-8v-40a-18650-charger-pcb-protection-card) ## Best For - dollatek enthusiasts ## Why This Product - Trusted dollatek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Triple Safety Shield:** Overcharge, over-discharge, and over-current protections keep your battery safe - • **Compact & Lightweight:** Slim 46x60x3.4mm design weighing just 8.8g fits seamlessly into your toolkit - • **Precision Voltage Control:** Maintains optimal 16.8V charging with ±0.05V accuracy - • **Powerhouse Current Handling:** Supports up to 40A continuous discharge for high-demand drills - • **Universal Lithium Compatibility:** Works flawlessly with 18650, 26650, and polymer lithium batteries ## Overview The DollaTek 4S 16.8V 40A BMS Protection Board is a compact, high-precision battery management system designed for lithium-ion packs powering electric drills. It delivers robust 40A continuous discharge current with precise voltage regulation and comprehensive safety features including overcharge, over-discharge, and over-current protection. Lightweight and universally compatible with popular lithium battery formats, it ensures reliable, efficient, and safe power delivery for professional-grade tools. ## Description Specifications: Charging voltage: 16.8V ~ 18.1V Overcharge voltage: 4.25±0.05V Over discharge voltage: 2.5V ± 0.05V Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current). Continuous charging current (upper limit): 20 A. Internal resistance: less than 100mΩ Operating temperature: -40 to 50 °C. Storage temperature: -40 to +80 °C. Weight: 8.8g Size: 46 x 60 x 3.4mm Suitable for: 1. Suitable for lithium batteries with rated voltage of 3.7V and full voltage of 4.2V (including 18650, 26650, polymer lithium batteries, no size limit). 2. Suitable for electric drills with starting current below 80A and power below 135W. Attention: If you wire 0V, 4.2V, 8.4V, 12.6V, 16.8V, do this exactly according to the circuit diagram. Do not intentionally short circuit. When using a brush motor type, try connecting a non-polar capacitor (voltage above 25V, capacity 10uF-100uF) in parallel with the positive and negative terminals of the motor to prevent the reverse voltage generated by the motor from interfering with the protective plate or the failure of the MOS tube. Do not connect any load or equipment to the output when soldering the battery for the first time. Do not mix the good battery and bad battery to use. The internal resistance of 4 battery capacity is closer and will be better. Package includes: 1 x 4S 40A Lithium Battery Protection Board Review: buon prodotto - buon prodotto Review: va bien - Fuciona bien ## Features - High precision voltage detection circuit, fine workmanship and durable. - Highlight: over-discharge protection, over-current protection, overcharge protection; High charging and discharge current; Compact size and light weight. - Prerequisites for starting the drill: To start successfully, the drill requires three 15C-20C power batteries or six 10C-15C power batteries. - For connecting cables, use copper wire over 3 square millimeters, the shorter, the better (cannot use nickel plate!!! ) - MOS transistor can control battery charge and discharge, low standby power consumption. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B099DT6KYB | | Amperage | 40 Amps | | Brand | DollaTek | | Built-In Media | Product | | Color | Multicolor | | Colour | Multicolor | | Current Rating | 40 Amps | | Customer Reviews | 4.5 out of 5 stars 137 Reviews | | Input Voltage | 16.8 Volts (DC) | | Item Dimensions D x W x H | 3D x 46W x 60H millimeters | | Item Weight | 8.8 Grams | | Item weight | 8.8 Grams | | Manufacturer | DollaTek | | Mfr Part Number | ELA18767 | | Model Number | ELA18767 | | Number of Ports | 1 | | Output Voltage | 16.8 Volts | | Output voltage | 16.8 Volts | | Product dimensions | 3D x 46W x 60H millimeters | | Specification Met | CE | | Specification met | CE | ## Images ![DollaTek 4S 16.8V 40A 18650 Charger PCB Protection Card BMS Lithium Ion Charger Lipo Cell for Motor Drill with Balancer - Image 1](https://m.media-amazon.com/images/I/71vjPtaZgKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ buon prodotto *by C***N on 26 April 2026* buon prodotto ### ⭐⭐⭐⭐⭐ va bien *by M***E on 21 December 2025* Fuciona bien ### ⭐⭐⭐⭐⭐ Gutes Schutzboard mit vernünftigen Bauteilen und balancing! *by D***E on 12 May 2026* Super BMS! Habe mir damit eine 40000 mAh Powerbank gebaut. Das Aufladen funktioniert damit wunderbar. Vernünftige Dimensionierung der balancing Leitungsanschlüsse und vernünftige Mosfets sind verbaut. Die Platine wird bei Schnellladen nur minimal warm, was für mich ein gutes Zeichen ist. In Verbindung mit einer 100W PD Ladeplatine ein wirklich gutes Team! Von mir eine klare Kaufempfehlung! Sollte die Langzeiterfahrung sich ändern, werde ich die Rezension dementsprechend anpassen! --- ## 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.tn/products/641402452-dollatek-4s-16-8v-40a-18650-charger-pcb-protection-card](https://www.desertcart.tn/products/641402452-dollatek-4s-16-8v-40a-18650-charger-pcb-protection-card) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-18*