Power Banks

How to choose a power bank

Three questions are enough: how many times you want to charge your phone, how fast, and whether you'll take it on a plane.

How much capacity (mAh) do you need?

The capacity printed on a power bank is the capacity of its cells. Some energy is lost converting the voltage while charging, so a phone actually receives about 60% of the stated figure. For example, the FIT2 K100 is rated 20000 mAh, with a rated output capacity of 12000 mAh at 5 V.

• 10000 mAh – roughly 1–1.5 charges of a modern phone. Fits in a pocket; ideal for everyday use.
• 20000 mAh – about 2–3 charges, or two devices. Good for weekends and travel.
• 30000–60000 mAh – several days off-grid: hiking, a summer house or the whole family. Weighs up to about 1.2 kg.

How fast will it charge? Look at the watts (W)

Older models with basic USB output (2.1–2.4 A) charge slowly. If your phone supports fast charging, choose a power bank with USB-C PD (Power Delivery) or QC: most FIT2 models (K7, K10, K100, K9) deliver up to 22.5 W. A laptop needs more – the FIT2 PRO C40 delivers up to 65 W over USB-C.

Built-in cables, a display or wireless charging?

• Built-in cables mean no separate cable to carry: the FIT2 K52-6, FIT2 H30C and REMAX RPP-565 have built-in USB-C and Lightning cables.
• A digital display shows the remaining charge in percent (e.g. FIT2 K100, K55).
• Magnetic wireless charging – the REMAX RPP-65 snaps onto a compatible iPhone or magnetic case and charges without a cable (up to 15 W).

To recharge the power bank itself you'll need a USB-C cable and a charger – see charging cables and chargers.

Can you fly with a power bank?

Yes, but only in carry-on baggage – power banks are not allowed in checked luggage. Under IATA guidance, what counts is the watt-hour rating (Wh = mAh × 3.7 / 1000):

• up to 100 Wh (about 27000 mAh) – no airline approval needed: 10000 mAh ≈ 37 Wh, 20000 mAh ≈ 74 Wh;
• 100–160 Wh – only with airline approval, maximum two: e.g. 30000 mAh ≈ 111 Wh;
• over 160 Wh (e.g. 50000 mAh ≈ 185 Wh) – not allowed for passengers.

Airlines may apply stricter rules (for example, banning power bank use during the flight), so check your airline's conditions before you travel.

In short: which one is right for you?

• Everyday carry – 10000 mAh with 22.5 W (FIT2 K7, the slim FIT2 K10).
• Travel and flights – 20000 mAh (FIT2 K100, K52-6 with built-in cables).
• Hiking, summer house, the whole family – 30000–60000 mAh (FIT2 K9, K55, REMAX RPP-565).
• For a laptop – FIT2 PRO C40 (65 W).
• Cable-free for iPhone – the magnetic REMAX RPP-65.

You can see most of our power banks at the FIT2 store in Vilnius Outlet (Vytauto Pociūno g. 8, 2nd floor) – it's worth checking availability of a specific model in advance.