Eventually everyone runs into the issue of having a bike that you haven't ridden in weeks not having any juice in the battery aka a dead battery. This happens because lead acid batteries can self discharge by up to a volt per week if they are not on a trickle or solar charger. Starting a bike really tasks the battery to deliver a large jolt of current and if the voltage has fallen to a certain threshold it may turn over for a second and then die or not turn over at all. Moreover, if the battery is too low many of today's smart chargers will not charge a deeply discharged battery because the battery will actually draw to much power from the charger and could perhaps damage the unit. What you need is a jump and jumping off another car or a bike is not a good idea as you can damage the electrical charging systems of the cars or bikes in the process. It is always better to jump off a static source of 12 volts dc. In the past that meant lugging a heavy car or spare bike battery but no mo'. Now there are new jumper technology that use Lithium batteries as the power source. They are compact and very powerful and can easily jump your car and bike. They fit in the palm of your hand and as a bonus can charge your cel phone or tablet to boot. They are really handy to have but you have to be careful in your purchase. The prices range from $40 to over $140 with brands like Anti Gravity products which is the leader in quality to some of the low end Chinese imports. Remember the exploding hoverboards in the news, yep the same Lithium technology but there are safe implementations and dangerous ones so don't go for the untested cheap products. There are some mid price alternatives and prices will continue to go down over time. The better quality units will have battery monitoring systems called BMS for short that prevent the unit from over/undercharging which can lead to the chemistry going into a melt down.
This review is for the Bolt Power D28 500 Peak Amp Portable Car Battery Jump Starter which I purchased from Amazon or about $69.95. I currently have the Anti Gravity products XPS unit which I bought last year and used the hell out of it but these are more expensive and I am not happy with the battery clips on this unit. For commercial use they don't hold up well. But the upside the company which is here in Los Angeles does sell spare parts.
The Bolt Power D28 500 Peak Amp Portable Car Battery Jump Starter is the same type of product but one thing I liked right away is the sturdy hard case that it came with. Nice looking too.
So the way you want to think of this is as a portable power source for all your devices, phone, tablet, notebook and yes your bike or car. This is a 13 amp battery which is an indication of its level of power but Lithium can deliver short bursts of power of up to 200 cranking amps to help you start your car or bike. It is really easy to use, you simply plug in the jumper cables and connect them to the appropriate polarity on your battery red to positive and black to negative and wallah bike starts and runs. You have to remember however that technically your battery is still dead, so if you drive the bike for a mile and then stop that is not enough time to charge the battery so it will not start without a jump. Also you should know that driving a bike or car with a discharged battery will place stress on your diodes and voltage regulator which can cause them to fail due to overheating. It is best to jump the bike and leave the jump starter on for a few minutes to boost the battery out of the mud and raise the voltage where your battery charger can take over before riding. With a more fully charged battery the load is reduced from the voltage regulator and it continues chugging. So imagine no more dead bike syndrome.
The unit has two USB ports and a slew of adapter cables to hook up to your devices. It has a cigarette lighter adapter so you can charge the unit off your cars system. The fit and feel of the unit is superb with a rubber coated plastic. It has a flash light and LED indicator that sets how much power is left in the unit.
With unit like this it takes the drudgery out of having to boost your self or someone who might need it in your travels. This is not the only unit out there but this was one of 4 units that received high praise from Consumer reports.org. Good price, great performance only time will tell how long it will hold up but I am hopeful as the company took great pride in making the unit.
Costco is now selling a competing product for about $59.95 which is a real deal.