Choosing Batteries: Myths, Reality, and Practical Tips

02.05.2025

Choosing the right battery is about balancing technology, safety, and real user needs — not blindly believing in myths.

Author:
BTRY.ENERGY

Choosing Batteries: Myths, Reality, and Practical Tips

Why this topic matters

Batteries are a key component in FPV drones, e-bikes, backup power systems (EW, ISR), and mobile devices. Their quality and proper selection directly affect not only performance but also safety, longevity, and operating costs. Despite this, the market remains full of myths, and users often rely on outdated assumptions.

Battery types: what’s relevant today

Li-ion (Lithium-ion): The most common type. High energy density, stable performance, moderate weight. Suitable for most mobile applications.
Li-Po (Lithium-Polymer): Lightweight and flexible in shape. Require careful monitoring of charge, temperature, and physical integrity.
LiFePO₄ (Lithium Iron Phosphate): Safer, heat-resistant, and long-lasting. Often used in stationary energy storage solutions.
NiMH / NiCd: Outdated technologies. Still found in household devices or niche applications.

Myths you should forget

Myth	Reality
Batteries must be fully discharged	This applies only to NiCd. Li-Ion and Li-Po do not need it, and full discharge may even be harmful. Keeping the charge between 20–80% is recommended
Charging overnight damages the battery	Modern chargers include auto shut-off after full charge. Overnight charging will not harm the battery
All batteries are the same	Quality varies greatly depending on the manufacturer. Trusted brands ensure high reliability and safety

Practical tips

Charge correctly: use balancing chargers and never exceed the recommended voltage.
Avoid deep discharge: for Li-Ion — not below 2.5V, for Li-Po — not below 3.3V per cell.
Temperature range: do not charge below 0°C or above 45°C.
Storage: if not in use, keep the battery at 50–70% charge.
Physical inspection: check for swelling, cracks, or signs of overheating.
BMS and balancing: mandatory in large systems — not just an “option” but a safety requirement.