A portable battery is chosen by two numbers: how many times it charges the phone and how fast. Everything else — colour, percentage display, torch — is taste. At MobileLand power banks are grouped by capacity and by whether they have fast (PD) and wireless (magnetic) charging.
Capacity: how many phone charges
5,000 mAh — one phone charge; slim, pocketable; magnetic versions for iPhone and MagSafe cases.
10,000 mAh — two full charges or phone + earbuds; the best size-to-capacity ratio, cabin-bag friendly.
20,000 mAh — a weekend off-grid, a tablet or two phones; heavier (350–450 g).
30,000 mAh and up — camping, a laptop over USB-C PD; check airline rules (up to 100 Wh without approval).
You realistically get about 60–70 % of the rated capacity: 10,000 mAh charges a phone with a 5,000 mAh battery one and a half times, not twice — that is voltage conversion physics, not a product flaw.
Power: how fast it charges
10–12 W (USB-A) charges a phone in 2–3 hours. 20–22.5 W PD gets an iPhone or most Androids to 50 % in half an hour — the minimum worth buying today. 45–65 W charges a laptop too. A power bank with a built-in cable solves the forgotten-cable problem; a magnetic (MagSafe) one snaps onto an iPhone with no cable.
Safety and warranty
Buy a power bank with overcharge and overheat protection (all our models have it) and do not leave it in a car in the sun. 12-month warranty, 24–48 h delivery across Montenegro, cash on delivery.
Frequently asked questions
How many times does a 10,000 mAh power bank charge a phone?
Realistically 1.5–2 times for a phone with a 4,500–5,000 mAh battery. 30–40 % is lost in voltage conversion (3.7 V cells → 5 V USB) — true for every manufacturer regardless of price.
Can I take a power bank on a plane?
Yes, in hand luggage, not checked. Up to 100 Wh (about 27,000 mAh) without approval; 100–160 Wh with airline approval. The Wh capacity is printed on the power bank.
What does PD mean and why does it matter?
Power Delivery is the USB-C fast-charging standard: 20–22.5 W gets an iPhone or most Androids to 50 % in half an hour, 45–65 W charges a laptop too. A power bank without PD (USB-A only) charges 2–3 times slower.
How long does a power bank last?
Quality cells endure 500–1,000 cycles, i.e. 2–4 years of regular use. Do not leave it empty for months and do not keep it in a car in the sun — that shortens life the most. Warranty is 12 months.
How do I pay and how long does delivery take?
Payment is cash on delivery; courier delivery across Montenegro takes 24–48 h from confirmation. You can also collect in one of the 7 MobileLand stores.