I am 178lbs and my bike is around 44lbs, there are so many factors that eat up battery power so its best to ride as often as possible and learn what your battery is capable of! Big headwinds kill batteries more than anything in my experience along with big elevations so conditions are always a factor so you just have to adjust on the day and save enough for the return journey! I do conserve my battery as much as I can and being fit helps in that aspect so regular riding makes a big difference! My bike has 22 gears (50-34 x 11-32) so that helps to save the battery as you can use the low gears to spin without using the assist!The answer will depend on you. Let's take two examples:
@RabH has a single 500Wh battery and rides some fairly impressive distances. In the picture thread he graces us with his constant good mood and reports of his 50+ mile rides that often have several thousand feet of elevation. I suspect he's light and fit as he sometimes mentions riding with no assist for long periods. He has a Giant racing bike type bike with a Yamaha power unit. So a relatively lightweight bike.
I'd plan on sometimes, maybe once, wanting to get home quickly with a high wind against you and not providing much self-power .Thanks guys. I just don't want to be stuck in the mountains of Nevada with my backpack, rifle and 4 panniers of deer meat and no juice in the battery.
Guess I'll to get that TREK mountain e-bike and see what the range is in the mountains with a full load. All I need is about 15 miles with me giving at least 50% of the power.
nope, it pretty much works with all ebike batteries or 24/36/48volts packs aether they are for a lawn mower or a scooter.Using a fast charger means shorter battery life ==> expenses in the future. Grin Satiator does not work with many batteries.
But you don't need to ask anybody for a favour to plug in to charge. A stop to charge the battery costs invaluable time of the travel. I don't know how frequently and how far you are riding but for me it was just to swap batteries at the farthest way-point yesterday. The greatest benefit is no range anxiety. And the bike has a motor to help the rider carry things.A spare battery takes a LOT of space and is HEAVY.