December 7, 20205 yr Hi all, thinking of upgrading to 620wh bosch battery from 500wh, but not sure if its worth it if its not that much more of a mileage difference, would anyone have a idea of a rough difference in mileage given all the variables, thanks.
December 7, 20205 yr Do the maths. 620wh compared to 500wh is a 24% increase so expect similar in range.
December 7, 20205 yr Range follows battery capacity in a very nearly directly proportional way as Nealh suggests. Most of the variables that effect range are difficult to pin down and often non-linear if you do pin them down. The best idea you'll get for other variables is from https://www.bosch-ebike.com/en/service/range-assistant/; and after some riding from your own experience.
December 7, 20205 yr I thought the new Bosch batteries were 625wh not 620, so it's a 25% increase.. Worth having imo, since us range-fear folks dont like to use the very last drop. The main variable are wind, hills, weight, and how lazy you are. Those are all fairly independent from the battery size, so the 625 (or 620) really will go 25% further. But how knackered is the 500? Not very green to dump it if it yet lives..
December 7, 20205 yr Author I thought the new Bosch batteries were 625wh not 620, so it's a 25% increase.. Worth having imo, since us range-fear folks dont like to use the very last drop. The main variable are wind, hills, weight, and how lazy you are. Those are all fairly independent from the battery size, so the 625 (or 620) really will go 25% further. But how knackered is the 500? Not very green to dump it if it yet lives..
December 7, 20205 yr Author yes sorry 625, my mistake, no my 500wh battery is only about year old done about 1200 miles, its a cx motor mtb generation 3, looking at katmandhu sl 2021 cx generation 4, 625, but will have to sell first
December 7, 20205 yr it will depend on the waight of both bikes as the bigger batt will be more heavy than the 500w one so it is not as simple as 25% more range. also some bikes can take both the 500w and the 625w batts and some cant as the 625w one is a bit longer than the 400w and 500w power tube batts. id not buy a new bike with just a bit more range if it was double and the same waight id think about it but then again those batts look near impossible to recell but my 400w 2014 batt is still going so they do last even with a dongle
December 8, 20205 yr In my case I use about 12w a mile so I would get another 10/12 miles, but you'll have to work out your watts per mile and decide. Why do you want the bigger battery, is it because you want greater range ? have you run out on you usual runs ? I have a 625w and for my 100+ kgs it is what I need for my usual 40 + mile runs as a 500w would be too tight. My wife has a 500w but is alot lighter so for her its adequate. As far as our Cubes is concerned the 500w & 625w batteries are not interchangeable.
December 8, 20205 yr it will depend on the waight of both bikes as the bigger batt will be more heavy than the 500w one so it is not as simple as 25% more range. True, but the weight difference will be very small compared to weight of rider+bike. I said 'very nearly directly proportional' in my earlier post. I think that there will be a marginal increase above the proportional increase as the bigger battery should (***) have lower internal resistance/voltage sag/energy wasted heating battery. I think (???) that will be a bigger positive effect than the negative weight effect, but either way the deviation from proportional will be very small. (***) assuming more cell banks in parallel of same quality cells
December 8, 20205 yr Author In my case I use about 12w a mile so I would get another 10/12 miles, but you'll have to work out your watts per mile and decide. Why do you want the bigger battery, is it because you want greater range ? have you run out on you usual runs ? I have a 625w and for my 100+ kgs it is what I need for my usual 40 + mile runs as a 500w would be too tight. My wife has a 500w but is alot lighter so for her its adequate. As far as our Cubes is concerned the 500w & 625w batteries are not interchangeable. The 500wh gives about 40ish miles with cx power motor 75nm so can use up battery quite quickly depending on usage. Thinking of doing bit of touring so looking at 625 battery but has even more powerful motor-khatmandhu cube sl with 85nm so probably will not be worth the upgrade with not that much more mileage.
December 8, 20205 yr The 500wh gives about 40ish miles with cx power motor 75nm so can use up battery quite quickly depending on usage. Thinking of doing bit of touring so looking at 625 battery but has even more powerful motor-khatmandhu cube sl with 85nm so probably will not be worth the upgrade with not that much more mileage. In your case for touring I would stick with your 500w and buy a spare, much cheaper. I see 2nd hand ones nearly new for £400 on eBay. Although I haven't done it yet my wife has a Cube 500w with the alp 50nm motor and i have also ordered one with the intention of using her battery for a tour next year, all covid things going to plan
December 8, 20205 yr Author In your case for touring I would stick with your 500w and buy a spare, much cheaper. I see 2nd hand ones nearly new for £400 on eBay. Although I haven't done it yet my wife has a Cube 500w with the alp 50nm motor and i have also ordered one with the intention of using her battery for a tour next year, all covid things going to plan tempted with the spare, but just a bit heavy, also always bit wary of buying batteries on ebay
December 9, 20205 yr Bosch do an excellent range calculator. You can dial in your bike model, battery, preferred cycling mode, terrain etc and it willtell you how far you can get. In my experience it is excellent: https://www.bosch-ebike.com/en/service/range-assistant/ And yes, it is well worth it, if you ever get near to running out of range on a 500. Cheers, John
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