Topvision 2200a đỉnh 21800mah khởi động nhảy ô tô di động năm 2022

For those of you who may not know, if the 12V car battery is actually reading 12V on a test, it is considered "dead" (discharged). 12v is just a nominal designation.

I tested my car battery and it read about 7.5V for a 350 CID / 5.7L gasoline engine. My Topvision has been in the wife's vehicle since the first of May, so 5 months later this unit was at 88% after an entire blistering Sonora High Desert heat summer (inside a rear interior compartment).

Heat is a battery's true enemy. The cold - not so much short of Arctic conditions, at least for a good battery.

My battery tested at apx 7.5 VDC. Naturally, it didn't start right away nor should anyone expect it to. The attempt was to gauge how this unit works.

It would not start right after the unit was connected (didn't expect it to), but waiting several minutes, the vehicle started right up, while only taking 3% (down 88% to 85%) capacity of this unit.

The manufacturer said that the unit turns itself off after 30 seconds, and to reattach the cables to reengage the charger. I just know it works (from other vehicles) that it has to sit there for more than 30 seconds, just a few minutes and even a recently failed 'dead' battery (that will not hold a charge) will jump start with this unit as I described: attach it, wait a few minutes, start your engines - at least in my experience. I'd remove and reattach the cables if I came across a particularly stubborn battery.

I had the vehicle run for a good 15-20 minutes to charge the jumped battery with the alternator, though I understand that it is better to go out and drive it around for that purpose. This unit is a whole lot easier than using my trusty old Schumacher 1200 peak amps (with built-in light and compressor) lead acid battery jump starter.

The old-school Schumacher unit served me well and for a long time (especially with how much I used it as an aux battery source for charging electronics) until the inevitable point where its battery could no longer hold a full charge.

If this old unit was fully functional and all I had, I'd have had to stand there holding it in place under my Van's hood, or perch that heavy unit precariously atop cables and hose, guess whatever time it took to charge the battery sufficiently, then disconnect it, try to start it, and repeat as necessary given my Van's (any Van's) cramped engine compartment.

The old school jump starter's placement under the hood in SUVs or most Coupes & Sedans was doable, but not in all cases. This could be very precarious and impractical in compacts too. This hand held unit could easily fit on top of the battery and makes it possible to close the hood from the rain.

This unit may not have a tire compressor built into it, but it surely is FAR easier to find a place to securely set it where one doesn't have to worry about it shifting from its place or falling from the vibrations when starting the engine- especially true in my cramped Van engine compartment.

This is especially nice if my wife ever had to use it, not that she could not handle the old bulky Schumacher but like that she would no longer need to lug that old heavy unit, especially during inclement weather, where it's light weight will not be pressing on hoses or pulling on any wires or vibrating out of its place.

This unit also has a sufficient enough light built into it to see the battery to clamps proper polarity. Very important feature, and it can also be used as a power bank for electronics.

Even with built in polarity protection, nobody wants to test that feature, especially when stranded. I'd advise making the polarity indicators as easy as it can be to tell the difference even in low light conditions.

I used Yellow, Red and green oil based paint marker pen on fluid caps & fuse boxes because auto manufacturers love stamping indicators like this in black, including the battery terminal +/- markings.

I also use those red and green battery terminal pads for their stated purpose and as an additional indicator of polarity, but those pads can get to the point where its hard to tell which color is which.