--- product_id: 543922835 title: "Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack)" brand: "jacobsparts" price: "$0.60" currency: USD in_stock: false url: https://www.desertcart.ec/products/543922835-smallest-usb-type-c-3-7v-lithium-battery-charger-board store_origin: EC region: Ecuador --- # 4.2V stable output voltage 1A fast charge current Integrated multi-layer protection Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) **Brand:** jacobsparts **Price:** $0.60 **Availability:** ❌ Out of Stock ## Summary > πŸ”Œ Tiny charger, mighty power – never let your battery run dry! ## Quick Answers - **What is this?** Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) by jacobsparts - **How much does it cost?** $0.60 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/543922835-smallest-usb-type-c-3-7v-lithium-battery-charger-board) ## Best For - jacobsparts enthusiasts ## Why This Product - Trusted jacobsparts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Smart Charge Cycle:** Automatically stops and resumes charging to maximize battery lifespan and efficiency. - β€’ **Safety-First Design:** Built-in over-current, over-voltage, and under-voltage protection ensures worry-free charging. - β€’ **LED Charge Indicators:** Clear, bright LEDs keep you informed of charging status at a glance. - β€’ **Ultra-Compact Powerhouse:** At just 14Γ—18Γ—5mm, fits seamlessly into tight, precision-driven projects. - β€’ **Type-C Universal Compatibility:** Works effortlessly with modern USB-C PD chargers for broad device support. ## Overview The JacobsParts Smallest USB Type C Lithium Battery Charger Board is a compact, high-efficiency 1A charging module designed for 3.7V lithium batteries. Featuring USB-C input, automatic charge cycle management, and robust safety protections, it delivers reliable 4.2V charging in a sleek 14Γ—18Γ—5mm form factorβ€”perfect for professional-grade, space-conscious electronics projects. ## Description The JacobsParts Ultra-Small Lithium Battery Charging Board is engineered for efficient charging of 3.7V lithium batteries. Compact and weighing practically nothing, it incorporates a powerful 1A high current linear charging system, delivering fast and reliable charging. This product includes a Type-C interface for the power source, achieving compatibility with most PD chargers and ensuring broad connectivity. This well-designed charging module boasts an operational input voltage range of 5-6V and offers a stable output voltage of 4.2V, providing reliable and steady charging. Its intuitive design assures an automatic termination of the charging cycle when the final float voltage is reached and the charging current decreases to 100mA. The charging cycle automatically resumes when the battery voltage falls below 4.05V, corresponding to 80-90% of the battery capacity, guaranteeing a full battery. When your battery voltage dips lower than 2.9V, this unit initiates a pre-charging process with a 100mA current to safely and steadily rejuvenate your battery. The JacobsParts Charging Board is built with an integrated protection circuit, providing over-discharge protection with a value of 2.4V and over-current protection of 4A, ensuring the safety and longevity of your lithium battery. The board is simple to use, simply connect it to the power supply and it's ready to go. Despite its numerous functionalities, the board is surprisingly compact with dimensions of 14Γ—18Γ—5mm. The Type C port projects approximately 1.5mm, adding hardly any bulk to the unit. ## Features - An ultra-small, 1A charging board for 3.7V lithium batteries with USB Type-C power input and LED charge indicators - Charges to 4.2V, provides 100mA pre-charging for batteries with voltages under 2.9V - Incorporates automatic charge cycle termination and resumption for efficient charging - Integrates safety features including over-current, over-voltage, and under-voltage protection for secure charging - Compact and lightweight design (14Γ—18Γ—5mm), easy to install and use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CBNQH836 | | Amperage | 1 A | | Best Sellers Rank | #605,164 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,796 in Power Converters | | Brand | JacobsParts | | Color | Black | | Connector Type Used on Cable | USB Type C | | Current Rating | 1 A | | Customer Reviews | 4.5 4.5 out of 5 stars (50) | | Input Voltage | 5 volts | | Item Dimensions D x W x H | 0.71"D x 0.55"W x 0.2"H | | Item Weight | 1 ounces | | Manufacturer | JacobsParts | | Mfr Part Number | CPNT-E-2PK | | Model Number | CPNT-E-2PK | | Number of Items | 2 | | Number of Packs | 2 | | Number of Ports | 1 | | Output Voltage | 4.2 volts | | Specification Met | FCC, UL | | UPC | 845832035123 | | Unit Count | 2 Count | | Warranty Description | 1 year manufacturer | ## Product Details - **Brand:** JacobsParts - **Color:** Black - **Item Weight:** 1 ounces - **Output Voltage:** 4.2 volts - **Product Dimensions:** 0.71"D x 0.55"W x 0.2"H ## Images ![Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 1](https://m.media-amazon.com/images/I/71I0YL8vYAL.jpg) ![Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 2](https://m.media-amazon.com/images/I/71C8OrW2CeL.jpg) ![Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 3](https://m.media-amazon.com/images/I/71XZf5KwitL.jpg) ![Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 4](https://m.media-amazon.com/images/I/712iJtKzNNL.jpg) ![Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - Image 5](https://m.media-amazon.com/images/I/71vhDJ81YOL.jpg) ## Available Options This product comes in different **Item Package Quantity** options. ## Frequently Bought Together - JacobsParts Smallest USB Type C 3.7V Lithium Battery Charger Board 4.2V Charging Module with Protection Circuit and LED Charge Indicators 5V USB-C Input (2 Pack) - mxuteuk 50pcs Black Latching Mini ON/Off Switch Self-Lock Micro Push Button Switch DC 30V 1A for Light Lamp Wall Outlet DIY SMD Flashlight Type BK-1208 - MagiDeal 2X 23mm 2W Stereo Audio Speaker 1" inch 4 Ohm DIY Loudspeaker New --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/543922835-smallest-usb-type-c-3-7v-lithium-battery-charger-board](https://www.desertcart.ec/products/543922835-smallest-usb-type-c-3-7v-lithium-battery-charger-board) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-11*