Backup power batteries

Backup power batteries in Hong Kong

Updated 4 November 2026

Power banks start at about HK$78, a UPS replacement battery costs about HK$651 to HK$5,657, and a portable lithium power station is about HK$6,292 to HK$13,965. For prices that match the device you need to keep running, send the details as a request on BlaBlaPrice.

Rules for lithium batteries

Lithium batteries, including power banks, must be clearly labelled and meet international rules, and air travel is where people get caught out. A recent report said airport signs in Hong Kong only reminded passengers not to put lithium batteries in checked luggage and not to use power banks during flights, so check the current airline rules before you travel. The Labour Department's guidance notes cover the safe handling, use, charging and maintenance of rechargeable batteries, which is worth reading before you fit a home system.

What a UPS or home system must match

For a UPS or a home system the key figure is the backup time at your load. The Electrical and Mechanical Services Department's specification for uninterruptible power supplies requires a battery sizing calculation for the required backup time at the rated load, so ask any seller for the battery size and the time it gives at your load in watts. Check the battery type, since cartridges fit specific UPS models, and the voltage. For a home system, ask for the battery management system specification as well.

Season and timing

Winter in Hong Kong runs from December to February and summer from June to August, so November is a sensible time to buy a backup before the hot months. Buying now also gives you time to test the unit before the summer of June to August.

Delivery and how capacity is quoted

Prices are per unit, cartridge or kit. Capacity is given in mAh for power banks, in Wh or kWh for stations and batteries, and in VA for UPS units, so compare like with like. Several sellers in the results are based overseas, so confirm delivery to Central, Kowloon, Sha Tin, Tsuen Wan or Tuen Mun and how long it takes before you pay.

What to write in your request

Say what the battery must run, such as a router, a fridge, a medical device or a phone, and for how long. Give the battery type, the capacity in Wh or VA, the voltage, the quantity, the make and model of the device, the warranty you need and your delivery city. Your budget helps the AI find the right range.

It is free for buyers. Send the details through BlaBlaPrice once: the AI looks through sellers' websites and price lists in Hong Kong and shows the prices and businesses it finds. Sellers registered on BlaBlaPrice reply in the chat with price, terms and delivery, and your contact details stay hidden until you choose to exchange them. You can also invite local sellers yourself by sending them the request link. For related items see UPS units or portable power stations.