--- product_id: 179946739 title: "Comimark 1Pcs MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module" brand: "comimark" price: "SAR 53" currency: SAR in_stock: true reviews_count: 4 category: "Comimark" url: https://www.desertcart.com.sa/products/179946739-comimark-1pcs-mcp73871-usb-dc-solar-lipoly-lithium-lon-polymer store_origin: SA region: Saudi Arabia --- # Integrated system load sharing USB & solar/DC power compatible 1.8A max input current Comimark 1Pcs MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module **Brand:** comimark **Price:** SAR 53 **Availability:** ✅ In Stock ## Summary > 🔌 Charge smarter, power longer — the future of battery management is here! ## Quick Answers - **What is this?** Comimark 1Pcs MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module by comimark - **How much does it cost?** SAR 53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/179946739-comimark-1pcs-mcp73871-usb-dc-solar-lipoly-lithium-lon-polymer) ## Best For - comimark enthusiasts ## Why This Product - Trusted comimark brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Flexible Power Inputs:** Seamlessly switch between USB port, AC-DC adapter, or solar/DC sources for ultimate versatility. - • **Smart Current Control:** Voltage Proportional Current Control prioritizes system load over battery charging for optimal efficiency. - • **Precision Charging Options:** Preset high-accuracy charge voltages with programmable fast charge current from 50mA to 1A. - • **Built-in Safety & Protection:** Includes reverse discharge protection, thermal regulation, and undervoltage lockout to keep your battery safe. - • **Power & Charge in Perfect Harmony:** Simultaneously powers your device while charging the battery, so you never miss a beat. ## Overview The Comimark MCP73871 is a compact, integrated Li-Ion/Li-Polymer battery charge management module designed for professional-grade power solutions. Supporting up to 1.8A input current, it intelligently balances system load and battery charging with advanced safety features and multiple power source compatibility, including USB, AC-DC adapters, and solar inputs. Ideal for GPS, smartphones, and portable electronics, it ensures efficient, reliable, and precise charging in a sleek 4x4mm QFN package. ## Description FeaturesIntegrated System Load Sharing and BatteryCharge Management- Simultaneously Power the System andCharge the Li-Ion Battery- Voltage Proportional Current Control (VPCC)ensures system load has priority over Li-Ionbattery charge current- Low-Loss Power-Path Management withIdeal Diode OperationComplete Linear Charge Management Controller- Integrated Pass Transistors- Integrated Current Sense- Integrated Reverse Discharge Protection- Selectable Input Power Sources: USB Port orAC-DC Wall Adapter Preset High Accuracy Charge Voltage Options:- 4.10V, 4.20V, 4.35V or 4.40V- ?à0.5% Regulation ToleranceConstant Current / Constant Voltage (CC/CV)Operation with Thermal Regulation Maximum 1.8A Total Input Current Control Resistor Programmable Fast Charge CurrentControl: 50 mA to 1A Resistor Programmable Termination Set Point Selectable USB Input Current Control- Absolute Maximum: 100 mA (L) / 500 mA (H) Automatic Recharge Automatic End-of-Charge ControlSafety Timer With Timer Enable/Disable Control0.1C Preconditioning for Deeply Depleted CellsBattery Cell Temperature MonitorUndervoltage Lockout (UVLO)Low Battery Status Indicator (LBO)Power-Good Status Indicator (PG)Charge Status and Fault Condition IndicatorsNumerous Selectable Options Available for aVariety of Applications:- Refer to Section 1.0 ElectricalCharacteristics ± for Selectable Options- Refer to the Product IdentificationSystem ± for Standard OptionsTemperature Range: -40 C to +85 CPackaging: 20-Lead QFN (4 mm x 4 mm)ApplicationsGPSs / NavigatorsPDAs and Smart PhonesPort Review: Works as expected, quite well. - Does what it was designed for which is why I bought it. I'm just developing my project, but once I've settled on the design, I'll probably remove the status LED and make other minor changes to save energy. I will eventually optimize the design for low energy consumption and improved efficiency. Review: Works but no documentation - Sort of works, but there are options that work way better. First of all – no documentation whatsoever. I had to resort to reading the datasheet on the chip and following traces on the PCB to figure out what some of the solderable holes on the board are. Secondly – while the chip can in theory support 1A charging, the SMD resistor installed on the board caps it at 500mA. Yes, you could in theory replace it, but if you have SMD soldering capability, you're probably not buying this board anyway. Finally – get yourself an IP5306 based charging board and your own capacitor. It's smaller, cheaper, and simpler. ## Features - Integrated System Load Sharing and Battery - The MCP73871 device is a fully integrated linear solution for system load sharing and Li-Ion / Li-Polymer battery charge management with ac-dc wall adapter and USB port power sources selection - Package Included: 1 x MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module - If You Are Not Satisfied with Your Purchase for Any Reason, Please Feel Free To Contact Us at the Buyer Center or Support Email, 24/7 Quick Reply. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07V4PHKNX | | Amperage | 1.8 A | | Brand | Comimark | | Color | Black | | Compatible Devices | Li-Ion / Li-Polymer batteries | | Connector Type Used on Cable | USB | | Current Rating | 1.8 A | | Customer Reviews | 3.7 out of 5 stars 10 Reviews | | Input Voltage | 240 volts | | Manufacturer | Comimark | | Mfr Part Number | LY340 | | Model Number | LY340 | | Number of Items | 1 | | Number of Packs | 1 | | Number of Ports | 1 | | Output Voltage | 4.2 volts_of_direct_current | | Specification Met | UL, FCC | | UPC | 657835669546 | | Unit Count | 1 Count | ## Product Details - **Brand:** Comimark - **Item Weight:** 0.02 Kilograms - **Output Voltage:** 4.2 Volts (DC) - **Specification Met:** UL, FCC - **Input Voltage:** 240 Volts ## Images ![Comimark 1Pcs MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module - Image 1](https://m.media-amazon.com/images/I/61CJLJHPT6L.jpg) ## Questions & Answers **Q: What is the pinout of the header?** A: I used the pinout shown on this link:https://www.amazon.com/dp/B07V4PHKNX?ref_=pe_527950_33920250_dpLink ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as expected, quite well. *by P***I on June 14, 2025* Does what it was designed for which is why I bought it. I'm just developing my project, but once I've settled on the design, I'll probably remove the status LED and make other minor changes to save energy. I will eventually optimize the design for low energy consumption and improved efficiency. ### ⭐ Works but no documentation *by G***F on July 16, 2026* Sort of works, but there are options that work way better. First of all – no documentation whatsoever. I had to resort to reading the datasheet on the chip and following traces on the PCB to figure out what some of the solderable holes on the board are. Secondly – while the chip can in theory support 1A charging, the SMD resistor installed on the board caps it at 500mA. Yes, you could in theory replace it, but if you have SMD soldering capability, you're probably not buying this board anyway. Finally – get yourself an IP5306 based charging board and your own capacitor. It's smaller, cheaper, and simpler. ### ⭐⭐⭐⭐ Fine for the price. Little time with the datasheet available online made it pretty clear to use. *by F***N on August 18, 2022* Yeah, some documentation would have been nice but the data sheet is available online for the chip. ## Frequently Bought Together - Comimark 1Pcs MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module - Dorhea MT3608 DC-DC Step Up Boost Power Converter - 2A Module, Adjustable Step Up Voltage Regulator Board - 2-24V to 5V-28V Output Voltage (Pack of 10) --- ## 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.com.sa/products/179946739-comimark-1pcs-mcp73871-usb-dc-solar-lipoly-lithium-lon-polymer](https://www.desertcart.com.sa/products/179946739-comimark-1pcs-mcp73871-usb-dc-solar-lipoly-lithium-lon-polymer) --- *Product available on Desertcart Saudi Arabia* *Store origin: SA* *Last updated: 2026-11-07*