Does fast charging damage the battery?

No. Phones made from 2020 onwards manage charging speed and temperature themselves, so fast charging is safe for everyday use. If you want to stretch battery life as far as possible, wired charging at a moderate 10–20 W is the gentlest option.

Can I use any USB-C charger?

Yes, USB-C is a common standard. Fast charging, however, only works with a compatible charger (Quick Charge, USB-PD, SuperVOOC). Always use a certified charger — an uncertified one charges slowly and can be unsafe.

Wireless or wired charging — which is better?

Wired is faster and more efficient, because less energy turns into heat. Wireless is more convenient but slower and runs warmer. For long-term battery health wired is slightly better, though with current technology the difference is small.

How powerful a charger do I need?

It depends on the phone: iPhone accepts 20–27 W, Samsung Galaxy 25–45 W, and OnePlus and Xiaomi flagships 80–120 W. There is no need to buy the most powerful one — 20–30 W is enough for most phones and works with everything.

What power bank capacity should I choose?

10,000 mAh covers normal use — two to three full charges. If you travel a lot, 20,000 mAh is the better choice. Check the output power too: 20 W or more means the power bank can fast charge.

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Batteries

Green Cell AGM12 – sealed VRLA AGM battery, 6 V, 7 Ah

Name: Green Cell AGM12 – sealed VRLA AGM battery, 6 V, 7 Ah
Brand: Green Cell
SKU: 6995038
Price: 11.99 EUR
Availability: OutOfStock

SKU: 5902701411589

Product no longer available

This product is currently not available from our suppliers.

Technical Specifications

Battery chemistry: Rechargeable
Weight: 1 kg
Battery voltage: 6 V
Battery capacity (Ah): 7000 mAh
Compatible brands: Any brand
Battery technology: Valve-regulated lead-acid (VRLA)
Hazard pictograms: GHS09: Environmental hazard, GHS05: Corrosive, GHS06: Toxic
Safety warnings: Do not short-circuit the battery terminals.
Product height: 9.4 cm
Product depth: 15.1 cm
Product width: 3.5 cm