Last week I decided to replace the 3-year old battery in the Ohm Urban 700 to a new one, with much more storage.
The original battery, Bionx, 36V, shown here, started with 355Wh, and now had 265Wh capacity after about 3,500 miles. It would have been fine for another year if I used it just as a commuter bike. It can go 20+ miles with minimal battery boost usage, my usual mode of travel.
But I want to take longer rides. The original style battery is no longer available, so the shop put a mounting bracket on the downtube and relocated the water bottle holder with an adapter, and put on the current battery, rated at 48V and 555Wh. This is more than twice what I had before the switch.
I prefer the look of the bike with the new battery. 48V gives a little more boost than 36V. At my request, the shop set the system to "endurance" mode, which apparently lowers the initial acceleration a little bit, thus giving a longer range.
This is like the leash being removed, as I have enough storage for that long day ride I've been planning. The brake regeneration also seems to be stronger. Perhaps the new battery is capable of accepting more charge while doing this than the old battery.
I had thought of getting a newer e-bike, perhaps the new Kalkhoff Integrale or Focus Adventur or Faraday Porteur, but decided I like the smooth comfortable and very refined ride of the Ohm. So I'm good for another 3 years unless new battery technology brings along a stealthy 30# e-bike with over 400Wh of battery before then.