Li-Ion Batteries
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Rechargeable Li-Ion Batteries (18650, 21700, 26650)
For true professionals, power tool owners, DIY project enthusiasts, and electronic cigarette (vape) users. VIDEX Li-Ion rechargeable batteries (the popular 18650, 21700, 26650 formats) provide massive power and withstand hundreds of heavy charge cycles. We separate quality from cheap knock-offs by providing real capacity for your equipment.
Why choose VIDEX Li-Ion cells:
- Real capacity: VIDEX does not promise unrealistic miracles on the label – you get exactly the specified and tested mAh, which is critical in building battery packs.
- Smart protection (for Protected models): Available models with built-in BMS protection guard against overcharging, short circuits, and dangerous deep discharge.
- High Drain: Ideal for devices that demand a high current in a short time, such as power tools and high-performance electronics.
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Q: What is the technical difference between 18650, 21700, and 26650 rechargeable Li-Ion accumulators?
Q: How do Button-Top (raised positive) and Flat-Top (flat) Li-Ion accumulator contacts and protection circuit boards (PCB/PCM) differ?
Q: Why is it recommended to use 21700 accumulators in powerful LED searchlights and e-bike battery packs?
Q: How to properly operate and store Li-Ion accumulators to extend their lifespan to 500+ charge cycles?
Q: What is the storage term and self-discharge rate of 3.7V Li-Ion accumulators prior to recharging?
A: The difference is determined by casing dimensions and capacity: 18650 (18.3 x 65.0 mm, up to ~3000 mAh), 21700 (21.3 x 70.0 mm, up to ~5000 mAh), and 26650 (26.3 x 65.0 mm, up to ~5500 mAh). Larger diameter 21700 and 26650 accumulators provide 50–70% greater energy reserve and higher continuous discharge current.
Q: How do Button-Top (raised positive) and Flat-Top (flat) Li-Ion accumulator contacts and protection circuit boards (PCB/PCM) differ?
A: Flat-Top accumulators lack an additional microchip and have a flat positive top, whereas Button-Top models frequently feature a built-in PCB protection circuit board and raised contact. VIDEX protected Li-Ion accumulators with PCB electronically disconnect the circuit during overcharge, over-discharge (below 2.5V), or short circuit.
Q: Why is it recommended to use 21700 accumulators in powerful LED searchlights and e-bike battery packs?
A: The 21700 format offers the highest energy density to mass ratio (Wh/kg), ensuring sustained 10A–20A current output. This allows searchlights to maintain maximum luminous flux (lumens) without accumulator overheating and thermal throttling.
Q: How to properly operate and store Li-Ion accumulators to extend their lifespan to 500+ charge cycles?
A: Li-Ion cells must not be left completely discharged (below 2.5V) or exposed to direct sunlight above +45°C. For long-term storage, accumulators should be charged to approximately 40–60% of capacity and stored in a dry place at temperatures between 10°C and 20°C.
Q: What is the storage term and self-discharge rate of 3.7V Li-Ion accumulators prior to recharging?
A: The stability of the casing and internal chemistry ensures a 5-year storage resource with regular voltage monitoring. Li-Ion cells feature low self-discharge (around 3–5% per month), so a preventive recharge to 3.8V is recommended once every 6–12 months.
