My wife's vehicle is now six years old and it has, sorry had, its original battery until it let us down last week. Fortunately, I recalled that I had yet to review Laser’s 6000mAh Emergency Power Bank and it works as advertised – we were up and running in seconds, if only because it comes pre-charged.
It uses long life lithium-ion cells so it will retain more than 75% charge after six months in the boot. Laser recommend topping it up every six months or so.
It also comes with a 12V cigarette lighter adaptor that will output 5V/1A to charge the Power Bank that comes from the alternator during use. Normal recharge should be via a 5V/2A micro-USB charger and takes about one hour for a recharge. One charge will jump start a vehicle once.
I tested it on a variety of USB devices – GPS, tablets, and smartphones and it delivered up to 2.1A as required from the USB-A port. Impressively it powered and charged a Samsung Galaxy Tab S2 while being used as a GPS – this takes a lot of power. It comes with a cable/adapter for Apple/Lightning and micro-USB.
Laser have comprehensive instructions — as if they are needed — on the website and perhaps the best advice is to ensure that ancillary things like lights, radio, and air conditioning are turned off before you try the jump start.
At A$79.95 it may be a life saver.