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ZB2L3 Battery Capacity Tester — LED Display for 18650 Li-ion & Lead-Acid Batteries
ZB2L3 Battery Capacity Tester LED Display for 18650 Li-ion & Lead-Acid Batteries
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ZB2L3 Battery Capacity Tester — LED Display for 18650 Li-ion & Lead-Acid Batteries
The ZB2L3 is a dedicated battery capacity tester that measures the actual usable capacity of rechargeable batteries using the constant-current discharge method. It supports 18650 lithium-ion cells, NiMH packs, and lead-acid batteries, displaying real-time discharge capacity in mAh on a clear 4-digit LED readout. Essential for battery sorting, quality control, and DIY battery pack building.
Key Specifications
| Parameter | Value |
|---|---|
| Model | ZB2L3 |
| Input Voltage Range | 1.2V – 12V |
| Discharge Current | 0.1A – 3A (adjustable via external load resistor) |
| Cutoff Voltage | Adjustable (1.0V – 11.0V) |
| Measurement Range | 0 – 9999 mAh |
| Display | 4-digit red LED |
| Power Supply | DC 4.5V – 6V (micro USB or external) |
| Compatible Batteries | 18650 Li-ion, NiMH, NiCd, Lead-Acid (1.2V–12V) |
| Origin | CN |
Why Choose the ZB2L3?
- Discharge-based measurement — Measures actual usable capacity (mAh), not just voltage; reveals true battery health that voltage alone cannot show
- Wide battery compatibility — Tests 18650, 26650, AA/AAA NiMH, 9V, and 6V/12V lead-acid batteries within the 1.2V–12V input range
- Adjustable cutoff voltage — Set the discharge endpoint to match your battery chemistry (e.g., 2.75V for Li-ion, 1.0V for NiMH)
- Auto-stop — Automatically stops discharge when cutoff voltage is reached, protecting cells from over-discharge damage
- Clear LED display — 4-digit red LED shows accumulated mAh in real time throughout the discharge cycle
- Compact and portable — Small PCB module fits easily into test rigs, enclosures, or bench setups
Typical Applications
- Sorting and grading used 18650 cells for battery pack rebuilds
- Quality control testing of new lithium cells before assembly
- Measuring remaining capacity of lead-acid UPS and SLA batteries
- DIY battery pack capacity verification before deployment
- NiMH AA/AAA battery capacity testing for RC and hobby use
- Educational electronics lab demonstrations of battery discharge curves
Compatible With
- 18650 cells: Samsung INR18650-25R, LG HG2, Panasonic NCR18650B, Sony VTC5A
- Lead-acid: 6V 4Ah SLA, 12V 7Ah VRLA (with appropriate load resistor)
- NiMH: Eneloop AA/AAA, GP ReCyko, Duracell rechargeable
- External load resistors: 7.5Ω/10W or 15Ω/10W for 1A–2A discharge rates
Frequently Asked Questions
Q: Does the ZB2L3 include a load resistor?
No. The ZB2L3 module requires an external load resistor to set the discharge current. Common choices are a 7.5Ω/10W resistor for ~1A discharge from a 7.4V source, or a 15Ω/10W resistor for ~0.5A. The resistor must be rated for the power dissipated during discharge.
Q: How do I set the cutoff voltage for 18650 Li-ion cells?
Set the cutoff voltage to 2.75V for standard Li-ion 18650 cells to prevent over-discharge. Use the onboard potentiometer or DIP switch (depending on board revision) to adjust the threshold before starting the test.
Q: Can the ZB2L3 test a 12V lead-acid battery?
Yes. The ZB2L3 supports input voltages up to 12V. Use an appropriate load resistor (e.g., 4Ω/50W for ~3A discharge) and set the cutoff voltage to 10.5V (standard for 12V SLA batteries). Ensure the load resistor has adequate heat dissipation.
Package Contents
- 1× ZB2L3 Battery Capacity Tester Module
Load resistor, battery holder, and power supply not included.
