How to choose a power bank — 5,000, 10,000, 20,000 or 30,000 mAh?

A power bank keeps the phone alive all day. The catch: the bigger the capacity, the heavier and dearer it is. Dona lists 42 power banks, from 81,000 to 560,000 UZS. The capacity you need takes a minute to work out.

How to size it#

A phone battery is usually 4,500 to 5,000 mAh. A power bank delivers 60 to 70 percent of its rated capacity (the rest is lost to heat and conversion). So:

• 5,000 mAh: 0.6 to 0.7 of a phone charge. Pocket size, “to make it to the evening”.
• 10,000 mAh: 1.5 charges. The most popular everyday size.
• 20,000 mAh: 3 charges. Travel, two phones or a tablet.
• 30,000 to 50,000 mAh: 4 to 7 charges. A laptop or a long trip. Over 600 g.

Power (W), the speed#

Capacity is “how much”, power is “how fast”. 10 W is the old standard, slow. 20 to 22.5 W is fast charging for modern phones. 45 W and up is for laptops. If the name says “22.5W” or “PD 20W”, it charges fast.

The airplane rule#

Carry-on allows up to 100 Wh (about 27,000 mAh). Above 30,000 mAh an airline may object. If you fly often, take 20,000.

Real prices (Dona, September 2026)#

Prices are taken from the app catalogue as of 9 September 2026. A seller can change a price at any time; the current price and availability are shown on the product page in the app.

• Borofone BJ87 — 5,000 mAh — 81,000 UZS. The cheapest, pocket size.
• Hoco J160 — 5,000 mAh — 117,000 UZS.
• Remax FC-03 — 10,000 mAh — 144,000 UZS. The everyday all-rounder.
• Borofone BJ78B — 30,000 mAh — 156,000 UZS. Cheapest per mAh.
• Bj88B — 30,000 mAh — 166,000 UZS.
• Hoco J132a — 20,000 mAh — 181,000 UZS. The travel balance.
• Hoco J170a — 20,000 mAh — 187,000 UZS.
• Hoco Q34 — 10,000 mAh — 189,000 UZS.
• Hoco Q36 — 5,000 mAh, 22.5 W fast — 217,000 UZS. Small but fast.
• Hoco J101B — 30,000 mAh — 230,000 UZS.
• Borofone BJ78C — 50,000 mAh, 22.5 W — 259,000 UZS. Long trips, several devices.
• Ugreen PB312 — 20,000 mAh, 20 W, two-way fast charging — 360,000 UZS. Quality and speed.

What to ask in the live#

The seller holds the power bank: you see the weight and count the ports (USB-A, Type-C, Lightning). Ask: “How long to recharge over Type-C?”, “Two devices at once?”, “Is a cable included?”.