Uttam Energy Solutions LLP

A Lithium Iron Phosphate battery is a type of lithium-ion battery that uses LiFePO₄ as the cathode material. It’s known for exceptional safety, long life, and thermal stability, making it super popular for:.

• Solar power storage

• RVs, marine, and off-grid setups

• Electric bikes & scooters

• Backup power (UPS systems)

• Electric vehicles (especially buses and trucks)

Charging a Li-ion Pack

• CC/CV charging method (Constant Current / Constant Voltage)

• For a 4S pack, charger output should be 16.8V

• Charger must match chemistry, voltage, and current specs

• Always use a BMS to prevent overcharging

Charging Tips

• Use a LiFePO₄-specific charger (not standard lead-acid or lithium-ion).

• Charge at 14.4V typically; float not required (but some float at 13.6V).

• Max recommended charge rate: 0.5C to 1C (i.e., 50A–100A max).

Typical Specs

Voltage per cell: 3.6V or 3.7V nominal (4.2V max when fully charged)

Capacity: Varies widely (e.g., 2000mAh to 5000mAh per cell)

Cycle life: 300–1000+ full charge cycles

Charging method: Constant Current / Constant Voltage (CC/CV)

Safety Musts Never short the terminals Don’t overcharge or overdischarge Always use a BMS or protection circuit Don’t puncture, crush, or heat For packs: match cells by voltage and capacity.

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AA Lithium (Non-Rechargeable)

• Chemistry: Lithium Iron Disulfide (LiFeS₂)

• Voltage: ~1.5V

• Common Brand: Energizer Ultimate Lithium

• Pros: Long shelf life (~10 years), great for high-drain devices, performs well in cold temps

• Cons: Not rechargeable

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A Lithium-Ion (Li-ion) battery pack is a collection of lithium-ion cells assembled together to provide a desired voltage and capacity. They’re commonly used in: Electric vehicles (EVs) Laptops & smartphones Power tools Solar energy storage Drones & RC models

 Safety Must-Knows

• Never overcharge (above 4.2V/cell) or over-discharge (below 2.5V/cell)

• Don’t short-circuit the pack

• Always balance cells — this is where a smart BMS shines

• Avoid puncturing or overheating

• Store at 40–60% charge for long-term storage

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