1S–7S Lithium Battery Level Indicator Tester – 18650 Li-ion LiPo Capacity Meter (3.7V–29.4V)

Know Your Battery Level. Every Chemistry. Every Cell Count.

This compact battery level indicator and capacity tester covers 1S through 7S lithium packs (3.7V–29.4V) plus 12V and 24V lead acid batteries — giving you real-time capacity readout for virtually any battery system. Essential for DIY builders, RC enthusiasts, and anyone managing battery-powered systems.

Key Benefits

• 1S–7S Lithium Coverage — Supports 18650, LiPo, and Li-ion packs from 3.7V to 29.4V
• Lead Acid Support — Also works with 12V and 24V lead acid batteries
• Real-Time Level Display — Instant battery level readout via LED indicator
• Ultra-Compact Design — Tiny form factor integrates into any battery pack or enclosure
• 9 Configuration Options — Select the exact cell count and chemistry for your application

From RC packs to e-bike batteries to lead acid systems, this battery level indicator gives you the real-time capacity data you need to manage your power safely and effectively.

Frequently Asked Questions

Q: What configurations are available?
A: 1S (4.2V), 2S (8.4V), 3S (12.6V), 4S (16.8V), 5S (21V), 6S (25.2V), 7S (29.4V), 12V Lead Acid, 24V Lead Acid.

Q: Does it work with lead acid batteries?
A: Yes — 12V and 24V lead acid configurations are available.

Q: How does it display the level?
A: LED indicator display shows remaining capacity in real time.

Q: Is it easy to install?
A: Yes — the ultra-compact design connects directly to your battery terminals.

Q: Is it suitable for e-bike batteries?
A: Yes — the 6S and 7S options are commonly used in e-bike battery management.

SPECIFICATIONS

• Lithium: 1S–7S (3.7V–29.4V)
• Lead Acid: 12V, 24V
• Display: LED Capacity Indicator
• Weight: 0.01 lbs / 0.003 kg