I suspect everyone knows where this thread is going.

As I pulled the 40V 5Ah battery and charger out of the box, my first thought was, hmmm, I'll bet this would be a kick-ass e-bike power source.

Has anyone utilized one of these yet? I have an old giant FS mtb that might make a pretty cool e-bike. All I need is a motor and controller.

BTW, if you are in the market for a new mower, forget ICE powered ones. This thing is awesome. It is nice to know that I will never again waste time cleaning mower carbs because I neglected to properly winterize it.

Am I correct in assuming that when running at maximum power, that would produce about 200 Watts AT the output shaft itself? Of course that diminishes greatly as the battery begins to drain.

Why not start with a golf cart motor?

Not sure what the max draw is on it. It has a 5Ah rating, but that isn't necessarily the max draw. I take the rating of it to mean that it will put out 200w for an hour.

As for why I would use this over a golf cart battery, 2 things. First, and most importantly, I have it. Second, aren't golf cart batteries kind of heavy?

If I do make an e-bike, I would still be putting in a good bit of the power myself, so 200 watts might be sufficient anyway.

Right gotcha...I was thinking motor and you're talking battery. Yeah the batteries for a golf cart appear to be about the size of a car battery. I think the 'drain' will depend on the motor, obviously.

I wouldn't mind an extra 100w of power for 2 hours ;-)

Yeah, I know where this is going. ;-)

The biggest flaw:

Your battery is 5Ah. If it is a typical battery, it is good for 5amp draw (i.e. 1 C). The smallest controllers are 15amps. So you will try to draw 3 times the power it is capable of delivering. So, you will have serious voltage sag, and kill the battery in no time.

good idea though.

Plan B: Get three of these, wire them in parallel for 40v15ah, and you might have a shot.

Yeah, I was afraid that might be the case. I really have no interest in building an e-bike, now that I no longer bike commute (new job is a field tech, typical day is a few hundred miles). The only way it might have made any sense would be if I didn't have to put any money into a battery/charger.

A friend bought a 56V EGO mower, and said he was very happy with it. Its 14S, so its a nominal 52V, meaning my Luna battery could act as a back-up mower battery, after splicing-in connectors.

Its hot in the summer fairly early, so I normally don't mow till about 9:00...I know some of my neighbors want to sleep-in, so I don't want to wake them. I typically wake up around 6:00 due to my job (normal wake-up for work is 5:00)

I'd prefer to mow with electric at 6:00 when its nice and cool, but I was hesitant to buy. I knew I didn't want a corded mower, either. I've tried a corded string-trimmer, and I hate the 100-ft cord. Well, my edger wore out, and since my friend posted such a glowing review of the 56V EGO, I knew I wanted the weed-wacker and mower to share the same battery. So I bought the 56V weed-wacker.

I couldn't be happier with it, works great! 56V is overkill for a weed-wacker, but...this winter, I will sell/throw-away my old gasoline mower. Next spring I will buy a 56V EGO mower, which I fully expect to be adequate for my needs.