GerryAZ wrote:strowger wrote:jjeff wrote:^^^ I think your right on what might have happened, 5ah isn't much capacity for running a large fan. As a backup should this happen when out and about, I might suggest a smallish portable 12v Li battery jumper. I always carry one in the back of my Leaf for just such occasions. It came with a 12v cigarette lighter adapter or small jumper cables, oh and it also has a 5v USB output for charging portable things that use USB.
All in all for the <$30 I paid for it on sale, I believe $39 regular price, I hope it's worth it, if I ever ran into a weak 12v battery
I bought mine at a big box hardware type of store(Menards) but I believe Amazon and other places sell similar models.
Be careful with assuming that those LiIon jump-start packs will jump-start a Leaf with a discharged 12V battery.
The ones I have used, will only output 12V for jump-starting for a second or two - because they are small, their cables are small, and the current required to crank an engine would set fire to them in a few seconds.
The Leaf will not charge a 12V battery which is very deeply discharged - for example, if the voltage is too low. I have seen this with mine when the 12V battery went bad and was down to <11V. The Leaf would "start" on the power button and drive, but the DC-DC converter stayed off, because the 12V battery "looked bad" to the Leaf's electronics.
This second or two of power from a LiIon jump-start pack is not long enough to both power-on the Leaf, and have the Leaf decide the 12V battery is good enough to charge & start charging.
It depends upon the quality of the Li jump starter. I have used mine to start a 4.0L inline 6-cylinder, several different V-8 engines, motorcycles, and my 2015 Leaf (completely dead battery). Both of my Leafs (2011 and 2015) started just fine and recharged their 12-volt batteries after being completely discharged.
I don't have my little jump starter in front of me now but I can say that it doesn't have small wiring, I'd say 10 gauge minimum and the Li battery itself is somewhat substantial as I recall. I've always wondered myself how well something like this would work to jumpstart a ICE vehicle(probably the main reason they are sold) but I really feel it would add just enough Oomph to a weak 12v Leaf battery to boot the computer and start the DC to DC charging. I guess I won't know for sure unless I ever need it and considering I do a weekly or biweekly charge/desulphify routine on my Leaf battery, hopefully I won't have to try it for some years to come.