WattCycle 350A LiFePO4 Battery Monitor

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Compact】3.93 x 2.40 x 0.66 Inches
Accurate】With an accuracy of 1%
Smart】PVC waterproof screen protector and bright backlight
Compatible】12V/ 24V/ 36V/ 48V/ 60V/ 72V/ 84V batteries, default 12V LiFePO4 batteries
Energy-efficient】LCD material display lower power consumption, saving power
Warranty】1 year for free

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WattCycle 350A LiFePO4 Battery Monitor



  • Accurate Measurement: WattCycle battery monitor can measure the power with an accuracy of 1%, which allows you to allow the actual voltage and power of your battery and charge the battery in time.
  • LCD Display: It is equipped with PVC waterproof screen protector and bright backlight, even in the daytime outdoor environment, you can clearly read the content of the screen, LCD material display lower power consumption, saving power.
  • Suitable for a Wide Range of Battery Types: WattCycle battery tester is suitable for all types of batteries, including lithium iron phosphate, lithium-ion, lead-acid batteries (AGM, GEL). It is compatible with 12V/ 24V/ 36V/ 48V/ 60V/ 72V/ 84V batteries, default 12V lithium batteries.
  • IPX7 Waterproof: Fully enclosed protective casing to achieve IPX7 level of sealing, it can be used outdoors or in wet environments, even in rainy days.
  • Multi-scenario Application: It can be used to test the voltage and capacity of batteries in caravans, motorbikes, golf carts, automobiles, cars, ships, boats and so on.

Tech Specs

Brand Wattcycle
Product 3.93"(L) x 2.40”(W) x 0.66 (H) Inches
Cable 236.22 Inches
Gross Weight 14.33lbs (0.65kg)


Frequently asked questions

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Q1: What are the applicable battery specifications for it?

Various types of battery packs with operating voltages ranging from 8V to 120V can be used, including lithium batteries, lithium iron phosphate, lead-acid, nickel-metal hydride, etc. Please note that this product must be used with a sampler.

Q2: What can it used for?

This product is a high-precision current collection-type battery energy meter (also known as a Coulomb counter). It can accurately detect real-time voltage, current, power, true capacity, remaining usage time, and other parameters of the battery pack, allowing you to understand the working status of the battery at any time. It can be used in various products such as RVs, electric beds, electric vehicles, emergency power supplies, energy storage power supplies, measuring equipment, medical devices, various instruments, and meters that use batteries.

Q3: Can it charge for the EV battery?

It is 236.22 Inches (6m).

Q4: Dose it support the communication function?

Yes, it does. This product can be customized with TTL-level serial port communication functionality to upload battery meter parameters to the host computer. The battery meter sends parameters once per second during operation and adopts an internally secure and reliable optocoupler isolation method. For detailed information, please refer to the "WT-M03 Coulomb Counter TTL Serial Port Communication Protocol".

Q5: Do you have battery box for this battery?
A5: Not yet, WattCycle 12V 100Ah batteries are perfect fit Group 24 size battery box. And also fit higher snap-top battery box like Group 27 and Group 31.
Q6: Can it charge for the EV battery?

Yes! It can charge for the 12V EV battery.

Q7: Is a user manual included?

Yes, it comes with the product. Additionally, you can click here to access the electronic user manual.

Q8: What is the warranty policy?

This product should not be exposed to direct sunlight for prolonged periods, nor should it be subjected to extreme conditions below -10°C or above 50°C, as this may shorten the lifespan of the LCD screen.

From the original date of purchase, this product is covered by a 1-year warranty. Any non-human-made quality issues occurring during the warranty period will be repaired free of charge.

This product may undergo technical improvements or updates. If there are discrepancies between the product you purchased and the descriptions in this manual regarding appearance, technical specifications, etc., please refer to the actual product or the information provided on the website.

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