Know Your Battery—Anywhere, Anytime
Stop guessing State of Charge. The KL-F Bluetooth Battery Monitor measures voltage, current and coulomb count up to 120 V / 600 A, pushing live data to your phone so you can protect expensive LiFePO4, AGM or lead-acid banks in RVs, solar cabins, boats and forklifts.
Key Features
- 0–120 V, 100 A · 400 A · 600 A Options—choose the shunt that fits your system.
- Coulomb Counting & SOC %—accurate amp-hour tracking for true capacity insight.
- Bluetooth + Free App—configure alarms, view historical curves, push OTA firmware.
- Smart Protections—relay-driven cut-off for over-voltage, under-voltage, over-current, over-temp.
- Color-Code Current Flow—green = charging, blue = discharging at a glance.
- Self-Calibration & 0.4 W Stand-By—long-term accuracy without draining the pack.
Typical Use Cases
- Off-grid & RV solar systems—balance charge/discharge cycles on LiFePO4.
- Marine & yacht house banks—avoid deep-discharge damage while cruising.
- Golf-cart / forklift conversions—monitor high-amp lithium upgrades.
- Telecom backup & UPS cabinets—24 V / 48 V SLA or LFP strings.
- DIY powerwalls & battery labs—log AH / WH for cell testing.
Technical Specifications
| Model | KL110F | KL140F | KL160F |
|---|---|---|---|
| Voltage Range | 0–120 V (self-power 10–80 V) | ||
| Current Range | 0–100 A | 0–400 A | 0–600 A |
| Resolution | 0.01 A | 0.1 A | 0.1 A |
| Accuracy | Voltage ±2 % + 3d; Current ±5 % + 10d | ||
| Bluetooth Range | ≈ 10 m / 33 ft | ||
| Sampling Rate | 1 Hz | ||
| Protections | OVP, UVP, ±OCP, OPP, TEMP | ||
| Power Draw | ≈ 0.4 W | ||
Package Contents
- KL-F Battery Monitor Display
- Matching Shunt (100 A / 400 A / 600 A)
- 4-pin & 3-pin Cables
- Temperature Sensor Probe
- Ring Terminals & Mounting Screws
- User Manual (EN)
Why Buy from MCOOH?
- 🚚 Free worldwide shipping & 30-day returns
- 🛠️ 1-year warranty · lifetime tech support
- 📦 Ships within 3 business days
Free Shipping
Free shipping is available on all orders. Shipping methods and carriers may vary depending on the destination, order details, and available logistics options. Full Shipping Policy
Returns Policy
For returns and refunds, please review our full Refund Policy before placing an order. If you need help with an order, contact us before your order has shipped whenever possible. Full Returns Policy
When Will My Order Ship?
For Standard Shipping, we aim to pack and ship out your order within 4 business days. During special periods, such as heavy order processing or local inventory shortages that require deployment, please expect it to take an additional day or two for processing. We ship five days a week, Monday through Friday.
You will receive a shipment confirmation with tracking information via email when your order has shipped. Once you receive this email, we cannot change or cancel your order.
Can I Change The Shipping Address On My Order?
Please contact us immediately via email if you realize that you gave us the wrong shipping address — if it hasn't shipped yet, we might be able to correct it before it goes out the door.If your order ships to the address provided and is returned to us as undeliverable, then you are responsible for paying the cost of shipping again to resend it to you. If you decide you do not want your order reshipped, we'll refund you for the products less the original shipping charges, once your order returns to our warehouse. We'll reach out to you to coordinate your options before re-shipping.
If your order ships to an incorrect address provided at the time the order is placed and is not retrievable, we are not responsible and cannot offer reimbursement.
Unable to find satisfactory answers ? more FAQs
Let customers speak for us
My first impression after opening and installing batteries was that this meter is very well built considering the price and manufacturer. I had read some reviews stating that it's amp measurements were not accurate below 5 amps, I haven't seen any issues in any measurements I've taken, even side by side with my fluke meters. I've successfully taken accurate amp, voltage and continuity measurements with this ETCR6920B, the display is nice and legible. I haven't tried storing data and making transfers to a PC yet, the soft case is good enough for storage on a shelf and the test leads are of good quality and rated for 1000v. There's nothing bad to say about this meter especially when you consider the price, it's a really great meter.
Works as described.
