--- product_id: 160834719 title: "2pcs 12V-36V DC Voltage Protection Module Over Discharge Protection" brand: "onyehn" price: "HK$192" currency: HKD in_stock: true reviews_count: 8 category: "Onyehn" url: https://www.desertcart.hk/products/160834719-2pcs-12v-36v-dc-voltage-protection-module-over-discharge-protection store_origin: HK region: Hong Kong --- # 12V-36V input range 0.1V control accuracy 20A max instantaneous current 2pcs 12V-36V DC Voltage Protection Module Over Discharge Protection **Brand:** onyehn **Price:** HK$192 **Availability:** ✅ In Stock ## Summary > 🔋 Protect your power, prolong your day — never get caught powerless again! ## Quick Answers - **What is this?** 2pcs 12V-36V DC Voltage Protection Module Over Discharge Protection by onyehn - **How much does it cost?** HK$192 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/160834719-2pcs-12v-36v-dc-voltage-protection-module-over-discharge-protection) ## Best For - onyehn enthusiasts ## Why This Product - Trusted onyehn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Powerhouse:** Miniature 57x42mm board fits tight spaces without compromising performance. - • **Wide Compatibility:** Seamlessly protects lead acid & lithium-ion batteries from 12V to 36V systems. - • **Smart Battery Saver:** Auto disconnects load at preset voltage to extend battery lifespan and avoid downtime. - • **Precision Voltage Guard:** Ultra-accurate 0.1V control keeps your battery safe from over-discharge. - • **User-Friendly Interface:** 3-digit LED display & push-button setup make customization effortless. ## Overview The Onyehn 2pcs 12V-36V DC Voltage Protection Module is a compact, programmable battery low voltage disconnect switch designed for lead acid and lithium-ion batteries. Featuring a precise 0.1V control accuracy, a wide input voltage range of 12-36V, and a max instantaneous current of 20A, it safeguards batteries from over-discharge by automatically disconnecting loads at preset voltage thresholds. The module includes an easy-to-read 3-digit LED display and push-button controls for quick setup, making it an essential tool for reliable battery management in professional and DIY applications. ## Description Buy Onyehn 2pcs 12V-36V DC Voltage Protection Module Over Discharge Protection: Controllers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Good value and reliability - Been 3 years. In use everyday saving my battery every day. I use it on a dashcamera set up. Instruction bad. But video on YouTube showed how to pogram it and its easy once you watch it. 10/10 product and reliable. Review: Accurate, works as described - The built in voltmeter is within a few hundredths of a volt to my Fluke meter. The disconnect was within 0.1v of the disconnect setting. Perfectly acceptable for a $5 part. Some have complained that the disconnect continues to drain the battery after disconnecting the load. In my application, I have a 12V SLA battery, an AC to DC power supply set at 13.5V (float voltage) and a load. I connected the power supply and load to the VIN terminals, and the battery to the VOUT terminals. This is opposite to the published diagram. When the AC voltage drops out, the load stays on until the battery voltage drops below disconnect (12v), then the relay opens and the battery is disconnected and has no parasitic load. When AC power is restored the relay closes and the battery gets charged. ## Features - 🌟Board Size: 57 X 42 X 19mm/2.24 X 1.65 X 0.75inch(L*W*H), Input Voltage Range: DC12-36V, Control Accuracy: 0.1V, Power Consumption: <1.5W, Instantaneous maximum current before circuit breaker trip: 20A. - 🌟Note:Due to the limitation of the size of the PCB board, the relay size of this module is mini and the circuit lines are very thin. The current should not be too large during actual use. If the current exceeds 8A, the relay contacts may be blown and cannot be used normally.The maximum current is 10A when the voltage is below 12V, and less than 8A when the voltage exceeds 12V - 🌟Programmable battery low voltage disconnect switch for DC12-36V lead acid battery and lithium ion battery. It's a protection switch module, not included batteries itself.Compatible Battery: lead acid, lithium ion battery, solar panel battery.Not suitable for battery packs. - 🌟On-board momentary push button to set the low voltage disconnect parameter and 3 digit red LED display the parameter easy to operation.When the battery voltage reach the setting values, the module will disconnect load automatically to aviod the battery from over discharging to prolong the battery lifetime. (Note:The relay does not contain a power cut-off switch,remember to cut off the power supply after disconnection, otherwise the module will continue to use the battery until the voltage is 0.) - 🌟Reset:When the power is off, press and hold the two buttons at the same time, and then power on. At this time, the screen displays "888", indicating that the factory settings are restored.The factory-set protection value: 12V, difference value: 2V.Difference Value"is the value between the battery voltage to disconnect and the battery voltage to reconnect. - 🌟Display is accurate, the switch module is quickly to open and close when near minimum voltage; Settings is stored non-volatile, it can keep set when power off ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07QNXM4LS | | Best Sellers Rank | #30,493 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Electromechanical Controllers | | Brand | Onyehn | | Brand Name | Onyehn | | Color | black,gray | | Customer Reviews | 4.3 out of 5 stars 506 Reviews | | Display Type | LED | | Included Components | 2x Protection Module | | Item Dimensions L x W x H | 2.24"L x 1.65"W x 0.75"H | | Item Weight | 0.06 kg | | Manufacturer | Onyehn | | Material | Lead | | Material Type | Lead | | Model | XH-M609 | | Part Number | XH-M609 | | Product Dimensions | 2.24"L x 1.65"W x 0.75"H | | Unit Count | 2 Count | ## Product Details - **Brand:** Onyehn - **Color:** black,gray - **Item Weight:** 0.06 Kilograms - **Material:** Lead - **Product Dimensions:** 2.24"L x 1.65"W x 0.75"H ## Images ![2pcs 12V-36V DC Voltage Protection Module Over Discharge Protection - Image 1](https://m.media-amazon.com/images/I/71+zHSt8joL.jpg) ## Questions & Answers **Q: I have 20v input and want 6v output can you set the output voltage? I need low voltage protection and the ability to step down the voltage.** A: What you need is called a "buck". There are 3 kinds: step-up, step-down and step-up/down. I use a step up/down buck with this low-voltage cutoff module. As the output voltage from the LiPo battery that I'm using drops from 12.4V at fall charge to 10.4V at minimum operating voltage, the buck maintains a constant 12.0V to the powered device. When the battery reaches it's minimum recommended operating voltage of 10.4V, the low-voltage cutoff module cuts off power to prevent the battery from further discharging. LiPo batteries can be permanently damaged if they fall below about 9V output (and they're expensive to replace!) **Q: Will this work with LiPo batteries?** A: yes **Q: I can connect this to a li ion battery and it will output enough power for a 300w inverter? Something like 25 amps?** A: In your scenario, you would use this module to control a higher amperage relay that can handle the higher load. Just connect the output of the protection module to the control terminals of the larger relay. **Q: Why is imput voltage 12-36 but output is 6-60V? Can this be used with 56V battery?** A: Grammatical error, 36v max, in you're case it it will work if you have access to the connections of the individual cells or banks ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good value and reliability *by S***N on June 29, 2026* Been 3 years. In use everyday saving my battery every day. I use it on a dashcamera set up. Instruction bad. But video on YouTube showed how to pogram it and its easy once you watch it. 10/10 product and reliable. ### ⭐⭐⭐⭐⭐ Accurate, works as described *by T***D on November 24, 2024* The built in voltmeter is within a few hundredths of a volt to my Fluke meter. The disconnect was within 0.1v of the disconnect setting. Perfectly acceptable for a $5 part. Some have complained that the disconnect continues to drain the battery after disconnecting the load. In my application, I have a 12V SLA battery, an AC to DC power supply set at 13.5V (float voltage) and a load. I connected the power supply and load to the VIN terminals, and the battery to the VOUT terminals. This is opposite to the published diagram. When the AC voltage drops out, the load stays on until the battery voltage drops below disconnect (12v), then the relay opens and the battery is disconnected and has no parasitic load. When AC power is restored the relay closes and the battery gets charged. ### ⭐⭐⭐⭐ Works. No directions *by S***R on September 5, 2024* Another seller of this same item has excellent directions on the amazon page. This seller doesn't. I took off one star for directions. It looks to me like several sellers are selling the same item. The first one I got, from another seller, did not work at all. I opened the first one from this seller and it worked like a champ. And I have a spare. Every feature worked fine. When I lowered the voltage below the cutoff, it cut off great. When I raised it 2V over the cutoff, it came back on. I did not have to adjust the voltage, it was spot on to my meter out of the package. Perfect. I have a 24V LIFEPO4 battery, and it is nominally at about 26V. By 24V, there is almost nothing left in the battery, but my circuit doesn't like low voltage, so the cutoff at 24V makes a clean off, so if I forget to turn it off (yes, I did that once, with bad results), the circuit is protected. This is even higher cutoff than the battery pack bms (2.5V/cell=20V) . ## Frequently Bought Together - Onyehn 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module - APIELE 16mm Latching Push Button Switch 12V DC On Off Black Shell with LED Angel Eye Head for 0.63" Mounting Hole with Wire Socket Plug Self-Locking (Blue/Black Shell) - ARRAROWN ZK-1002T 2.0 Channel Bluetooth 5.0 Amplifier Board 200W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs, DC 12-24V 2.0 Channel Stereo AMP Module for DIY Speakers --- ## 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.hk/products/160834719-2pcs-12v-36v-dc-voltage-protection-module-over-discharge-protection](https://www.desertcart.hk/products/160834719-2pcs-12v-36v-dc-voltage-protection-module-over-discharge-protection) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-07-26*