--- product_id: 543922835 title: "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)" brand: "jacobsparts" price: "€ 11.22" currency: EUR in_stock: true reviews_count: 8 category: "Jacobs Parts" url: https://www.desertcart.pt/products/543922835-jacobsparts-smallest-usb-type-c-3-7v-lithium-battery-charger store_origin: PT region: Portugal --- # 4.2V stable output voltage 1A fast charging current USB Type-C universal input 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) **Brand:** jacobsparts **Price:** € 11.22 **Availability:** ✅ In Stock ## Summary > 🔋 Power up smart, stay ahead of the pack! ## Quick Answers - **What is this?** 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) by jacobsparts - **How much does it cost?** € 11.22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/543922835-jacobsparts-smallest-usb-type-c-3-7v-lithium-battery-charger) ## 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 - • **Safety-First Design:** Built-in over-current, over-voltage, and under-voltage protection for worry-free charging. - • **Pre-Charge Revival Mode:** Gently recharges deeply discharged batteries below 2.9V with a safe 100mA trickle current. - • **Smart Charge Management:** Automatically stops and resumes charging to maximize battery lifespan and efficiency. - • **Ultra-Compact Powerhouse:** Fits effortlessly in any project with a tiny 14×18×5mm footprint. - • **Universal USB-C Compatibility:** Seamlessly connects to modern PD chargers for fast, reliable power anywhere. ## Overview The JacobsParts USB Type-C Lithium Battery Charger Board is a compact, high-efficiency 1A charging module designed for 3.7V lithium batteries. Featuring smart charge cycle control, integrated safety protections, and LED indicators, it ensures fast, safe, and reliable charging. Its ultra-small size and USB-C input make it perfect for modern DIY electronics and professional projects seeking sleek, dependable power solutions. ## 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 14×18×5mm. The Type C port projects approximately 1.5mm, adding hardly any bulk to the unit. Review: Great little charger board. Solid red light means charging! - Soldered wire to magnets, making sure to put magnets on larger magnets first to maintain magnetism (heat will destroy/mix it up). Worked fine. One important thing to know, the lights. A solid red means you're charging. Review: Quality Item - This board is working well for me and the size is perfect for my LED flashlight project. ## 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 (14×18×5mm), easy to install and use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CBNQH836 | | Amperage | 1 A | | Best Sellers Rank | #644,291 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,885 in Power Converters | | Brand | JacobsParts | | Color | Black | | Connector Type Used on Cable | USB Type C | | Current Rating | 1 A | | Customer Reviews | 4.6 out of 5 stars 51 Reviews | | 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 | | Product Dimensions | 0.71"D x 0.55"W x 0.2"H | | 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 ![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) - Image 1](https://m.media-amazon.com/images/I/71I0YL8vYAL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great little charger board. Solid red light means charging! *by A***W on November 6, 2023* Soldered wire to magnets, making sure to put magnets on larger magnets first to maintain magnetism (heat will destroy/mix it up). Worked fine. One important thing to know, the lights. A solid red means you're charging. ### ⭐⭐⭐⭐⭐ Quality Item *by D***K on March 4, 2024* This board is working well for me and the size is perfect for my LED flashlight project. ### ⭐⭐⭐⭐⭐ Useful!!!! *by M***E on September 11, 2026* Great lil board for power delivery and battery charging ## 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? - 🛒 **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.pt/products/543922835-jacobsparts-smallest-usb-type-c-3-7v-lithium-battery-charger](https://www.desertcart.pt/products/543922835-jacobsparts-smallest-usb-type-c-3-7v-lithium-battery-charger) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-14*