Lead Acid (Pb) Replacement Battery
Direct drop-in LiFePO₄ replacement battery for 12V and 24V home inverters & UPS systems.
Upgrade existing 150Ah and 200Ah tubular batteries in minutes. Delivers 4× faster charging, 3,000+ operating cycles, zero water maintenance, and 100% emission-free indoor operation.
The CLN Lead Acid (Pb) Replacement Battery is the smartest, most reliable way to modernize your existing home inverter or UPS system. Designed with the exact same terminal posts and physical footprint as conventional 150Ah/200Ah tubular batteries, you simply disconnect your old heavy lead-acid battery and connect CLN Lithium.
Equipped with Grade-A Prismatic Lithium Iron Phosphate (LiFePO₄) cells and an integrated Smart BMS, it provides 3 to 4 times the operating lifespan, recharges in a fraction of the time, eliminates acid fumes and distilled water topping, and delivers reliable backup power during long Indian power outages.
Why Upgrade from Tubular Lead-Acid to CLN Lithium?
Traditional lead-acid tubular batteries have powered Indian households for decades, but they suffer from high energy losses, heavy weight, and recurring maintenance headaches. Here is how CLN Lithium completely transforms your backup experience:
| Performance Parameter | 150Ah / 200Ah Tubular Lead-Acid | CLN Pb Replacement Lithium (LiFePO₄) |
|---|---|---|
| Usable Depth of Discharge (DoD) | 50% max (higher drains damage battery) | >90% usable capacity without degradation |
| Recharging Time | 10 to 14 Hours (very slow) | 2.5 to 3.5 Hours (4× faster charging) |
| Cycle Life & Durability | 1,000 – 1,200 cycles (lasts 2.5–3.5 years) | 3,000+ cycles (lasts 8 to 10+ years) |
| Maintenance Requirements | Regular distilled water top-ups, acid checks | Zero maintenance — fit and forget |
| Fumes & Indoor Air Safety | Emits toxic lead-acid fumes & corrosive gas | 100% clean, non-toxic & sealed (safe for bedrooms) |
| Weight & Floor Space | 55 to 65 kg (bulky, heavy, difficult to move) | 16 to 24 kg (60% lighter, compact footprint) |
| Energy Efficiency | 70% – 75% (25%+ energy wasted in charging) | >95% round-trip efficiency at cell level (lower electric bills) |
Technical Specifications & Model Range
Whether you need a compact 12V unit for lights and Wi-Fi or a heavy-duty 24V setup for running refrigerators, desert coolers, and smart TVs, CLN offers standard modular configurations:
| Model Series | Nominal Voltage | Rated Capacity | Total Energy | Max Continuous Discharge | Target Inverter Setup |
|---|---|---|---|---|---|
| CLN-PB-12100 | 12.8 V | 100 Ah | 1.28 kWh | 100 A (1280 W) | Single 12V Inverter (700VA – 1100VA) |
| CLN-PB-12200 | 12.8 V | 200 Ah | 2.56 kWh | 150 A (1920 W) | High-capacity 12V Inverter (1100VA – 1600VA) |
| CLN-PB-24100 | 25.6 V | 100 Ah | 2.56 kWh | 100 A (2560 W) | 24V Inverter / Double Battery System (1500VA – 3000VA) |
Looking for Lead Acid Replacement Battery Specifications?
Download the official brochure for complete 12V and 24V model ratings, drop-in replacement guidelines, and dimensions.
Multi-Tier Built-In Smart BMS Protection
Active Cell Balancing
Maintains uniform charge levels across all internal LFP prismatic cells for maximum usable runtime and extended cycle life.
Thermal Protection
Automatic high and low temperature sensors shut down charging if temperatures exceed safety thresholds in hot Indian summers.
Over-Current & Short Circuit
Instantaneous millisecond cutoff protects connected household appliances and inverters from sudden power surges or electrical faults.
Who Is This Best For?
Frequently Asked Questions — Inverter Lithium Replacement
Can I connect this CLN Lithium battery to my existing home inverter?
Yes, 100%. The CLN Lead Acid (Pb) Replacement Battery is engineered specifically as a direct plug-and-play swap for standard 12V and 24V home inverters and UPS units (including brands like Luminous, Microtek, Exide, Livguard, Su-Kam, and solar hybrid inverters). You do not need to replace your inverter or modify your home electrical wiring.
How does a 100Ah lithium battery compare to a 150Ah lead-acid tubular battery in backup time?
A 100Ah CLN Lithium battery delivers equal or greater usable backup time than a 150Ah lead-acid battery. This is because lead-acid batteries can only be safely discharged up to 50% (giving ~0.9 kWh usable energy), whereas CLN LiFePO4 cells allow >90% Depth of Discharge (DoD) without damage (delivering ~1.15 kWh usable energy).
How fast does the CLN Lithium replacement battery recharge?
It charges up to 4 times faster than a tubular lead-acid battery. While lead-acid batteries take 10 to 14 hours for a full charge, CLN Lithium reaches full charge in just 2.5 to 3.5 hours. This is crucial during consecutive power outages or areas with erratic grid electricity.
Does it require any distilled water refilling or maintenance?
None at all. The CLN battery is completely sealed and maintenance-free. There are zero acid fumes, zero corrosive terminal crystallization, and zero water topping requirements, making it completely safe and clean to keep inside bedrooms, living rooms, or office spaces.
What is the expected lifespan and warranty?
CLN Pb Replacement batteries are built with Grade-A Prismatic LFP cells rated for 3,000+ charge cycles at 25°C. In normal Indian household use (1 cycle per day), it lasts 8 to 10+ years—compared to just 2.5 to 3.5 years for tubular batteries. It comes with a 3 to 5-year manufacturer warranty backed by CLN Energy.
Is lithium battery safe inside homes in hot Indian climates?
Yes. CLN uses Lithium Iron Phosphate (LiFePO4) chemistry, which is thermally and chemically stable and cannot undergo thermal runaway. Furthermore, an integrated Smart BMS constantly monitors temperature, over-voltage, short-circuits, and cell balance with automatic safety cutoff.
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