This digital waterproof round battery charge indicator works with lead-acid, lithium, and LiFePO4 from 8V to 100V. Its LCD screen shows state of charge (SOC) and voltage. Low-voltage warning and power-off memory ensure reliable daily use for cars, golf carts, boats, and RVs.
Wide voltage measurement & multi-battery compatibility
- This digital battery charge indicator measures DC voltage from 7V to 100V, covering 12V, 24V, 36V, 48V, 60V, 72V, and 84V systems with a resolution of 0.01V and accuracy of ±0.02%.
- It is compatible with lead-acid, ternary lithium, and LiFePO4 batteries, making it a universal solution for cars, golf carts, boats, RVs, and solar systems.
- The wide-angle LCD color screen simultaneously displays state of charge (SOC) as a remaining percentage and real-time voltage, with a working current as low as ≤15mA.
- It features an optional temperature sensor from -20°C to 80°C, allowing users to monitor battery thermal conditions for added safety.
- The meter can be easily switched between different battery types and voltage configurations via a single button, with all settings saved by built-in power-off memory.
Smart power management & reliable protection
- The IP68 waterproof round housing is fully sealed, allowing the meter to operate reliably in rain, dust, and high-humidity environments such as boats, golf carts, and RVs.
- Double-click the button to turn off the display and enter ultra-low power sleep mode, significantly extending battery life when monitoring is not needed.
- It has a built-in low-voltage warning function: when the battery voltage drops below the preset threshold, the screen flashes to alert the user, preventing over-discharge damage.
- The meter automatically saves the last used settings (battery type, voltage range, display preference) after power-off, eliminating the need to reconfigure each time.
- Short-press the button to cycle through display modes; long-press to enter setup mode – all operations are controlled by a single button for simple and intuitive use.
Applications
This battery meter helps prevent unexpected power loss in vehicles and equipment that rely on lead-acid or lithium batteries. It is especially useful for off-grid setups, weekend boating trips, and fleet operations where knowing exact battery status extends runtime and avoids costly downtime.
Boats
Electric Vehicles
Floor Sweepers
Solar Power Systems
| Model | SISCO-BI-5918 |
| Display | Wide-angle LCD color screen |
| Voltage Measurement Range | DC 7V – 100V |
| Voltage Resolution | 0.01V |
| Voltage Accuracy | ±0.02% |
| Resistance Accuracy | ±0.1% |
| Measurement Accuracy | ±(0.01% + 1) |
| Working Current | ≤15mA |
| Standby (Sleep) Mode Current | Negligible (display off) |
| Battery Types Supported | Lead-acid (12V/24V/36V/48V/60V/72V/84V), Ternary lithium, LiFePO4 |
| Low Voltage Warning | Yes (screen flashing) |
| Power-off Memory | Yes |
| Waterproof Rating | IP68 (fully sealed) |
| Operating Temperature | -20°C to 80°C (optional temperature sensor) |
| Mounting Type | Panel / Flush mount |
| Diameter | Approx. 54.5 mm (2.14 in) |
| Thickness | Approx. 17.8 mm (0.70 in) |
| Weight | Approx. 45 g (1.59 oz) |
| Input Power | DC 8V – 100V (directly from monitored battery) |
Dimension (unit: mm)
Q1: Can this battery meter work with both lithium and lead-acid batteries?
A1: Yes. It supports lead-acid (12V-84V), ternary lithium, and LiFePO4.The default setting is ternary lithium 3S, but you can easily switch battery types via the button.
Q2: Is the meter truly waterproof?
A2: Yes. The round housing is fully sealed with an IP68 rating, meaning it can withstand rain, splashing, dust, and even short-term immersion. It is designed for outdoor and marine environments.
Q3: Does the meter remember my settings after power is disconnected?
A3: Yes. It has built-in power-off memory that automatically saves your battery type, voltage range, and display preferences. You won‘t need to reconfigure after each power cycle.
Tips: How to get accurate readings and maintain your meter?
Setting the correct battery type before first use is essential because the meter cannot auto-detect your battery chemistry. A wrong setting will cause false capacity readings and incorrect low-voltage alarms. You must manually select lead acid, ternary lithium, or LiFePO4 and match your system voltage or series number. For ongoing accuracy, mount the meter in a dry location away from heat and vibration. If the screen becomes unresponsive, double-click the button to wake it from sleep mode. Clean the housing only with a soft, damp cloth and avoid solvents or high-pressure water to protect the IP68 seal.
Thank you for buying industrial test and measurement equipment on SISCO.com, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.
What is covered?
SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.
What is not covered?
- Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
- Expendable parts.
- Routine cleaning or normal cosmetic and mechanical wear.
- Damage from misuse, abuse or neglect.
- Damage from use of parts other than SISCO approved.
- Damage from use outside the product’s usage or storage parameters.
- Damage from use of parts not sold by SISCO.
- Damage from modification or incorporation into other products.
- Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
- Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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