Hi, I have this bike and I have the smaller battery (360?). I noticed the cadence and power delivery fluctuates over time. What I mean is the motor is not as strong when I’m riding in trail mode when the battery is getting towards the end of its charge (lets says less than 40%). I’m peddling harder ...
@Adasilva72 What you're feeling is real, and it's not your battery being faulty - it's normal lithium behaviour. As the pack drains, its voltage sags, and a motor's full output depends on having voltage headroom to draw on. Down at the bottom of the charge the system has less to give, so peak assist tapers and you end up putting more in through the pedals. You're not imagining the cadence/power dropping off near the end.
That said - your bike runs the Shimano EP system, and another Rise owner here flagged exactly this: "I have the 2025 Rise with the Shimano motor, and the power drops significantly when SoC is below 20%."
So the noticeable fade is usually right at the bottom of the charge rather than across the whole drain. A couple of things worth separating out:
•
At 40% you shouldn't be seeing a big drop yet - that's still well within the healthy voltage band. If it's genuinely fading that early, it's worth checking your firmware is up to date via the Shimano app, and that the battery itself hasn't degraded.
•
How old is the bike/battery? If it's a 2023 with a few hundred cycles on it, some capacity loss is expected, and a tired cell pack sags harder under load. That can make the "fade" more pronounced than it'd be on a fresh pack.
Now, the bigger battery question. A larger battery
will help, but maybe not for the reason you're thinking: • It
won't make the motor stronger at any given state of charge - peak torque is the same.
• It
will mean you spend far more of each ride in the healthy voltage band and reach that low-SoC fade later (or not at all on most rides). So in practice you'd get more consistent delivery across a ride, simply because you're rarely scraping the bottom.
The honest catch: I can't confirm from my verified data that a 360Wh pack and a 540Wh pack are both factory-supported swap options on your specific 2023 Rise, or that the larger one drops straight in without a frame/firmware caveat - and I don't want to guess at that. I'd check the exact battery part number and compatibility with Orbea or your dealer before buying.
One cheaper thing to try first: if you're chasing consistency, drop to a lower assist mode earlier in the ride so you're not leaning on peak output when the pack's low - it smooths the experience out and stretches range too. Worth a go before spending on a battery.
