Johnyy

So do you think the 21700's are definitely suspect old stock? Or perhaps after all this time they sorted the problem out? Why were they a problem for Tesla please?

Interesting. Two maybe foreign nationals in UK (welcome) with Eastern European names, and the Ebay add says postage from Poland. Almost sounds a bit like Green Cell, my existing 5.5 Ah battery supplier who are in Poland. None of which matters except my original battery seems ok

Well spotted Nealh and thanks. I had seen the words Panasonic, LG or Samsung at various places but not noticed they were missing from the 36v rear rack. That goes a long way to explaining the price difference with the 15Ah And yes it's actually the rear rack I need so I can use saddle bags. And the existing 5.5amp fitting is going to remain on the cross frame (in theory it's a reserve I could carry So I am now tending toward the 15Ah simply because the quality of the battery's are Panasonic 21700's

I live on a hillside so all my trip use battery heavily - although going the other way not so much, so I guess it balances out But my biggest take from above is it's about Ah. Looking at the eBay items above it seems to be that one of them is 22.5Ah and the other 15Ah. The 22.5 appears to be better value but I am suspicious of the difference in price

I have a Bafang BBS01B 36V 250W Mid Drive and a bullet battery on the downtube of 5.5 Ah and 187.2Wh. It's range is only about 10 miles, but to date that has been ok. Now I need a rear rack for panniers and want to significantly improve my range. I have seen threads here talking of 90 mile range (yes I have searched for answers). Quality batterys by Samsung or Panasonic would be good I do know. But I am completely confused about which measures I should be looking at to judge range - amps watts or what?. Seems I am dyslexic with electricity For example here are 2 ebay items and I have a feeling one is better than the other, but I have no clue 36V 15Ah (with rear rack max 750W) - https://www.ebay.co.uk/itm/185540251485?hash=item2b330f8f5d:g:CW4AAOSwgLZi-3~O&amdata=enc%3AAQAIAAAA8JNZmRzRbDf6yYtYxrKZnjlVbL54F9SJeOIRYoigRfS8ydZQB3ADgCOCN7Sd2y24qmNVR2%2Fhks7peimOF5ZjGdS9konTu%2Fw4Jk9uz9He9tgZhGCl8nM8kcUNMx1dkdZW8Bei%2B%2F3So52bkkfVXMSmKwXyNSBYreOTzW5LtXhy3fQNNPl9yLcglNcULU%2Fz0fy4tTsenmi8ymNXGwQ%2BOLUBkYFZ21ZHfwVYjaTS4u5HA7jeNHN4oLBoPFCr8WxajdSTtSHHlHoQvT1MpBFOjsTf1%2FcF50mX4DmLR1xHmlBZecASJOIAcjGnkv2Y9SeaF3xdFg%3D%3D%7Ctkp%3ABFBMmpKq3vdh 36V22.5Ah with rear rack - https://www.ebay.co.uk/itm/393937497492?hash=item5bb8812d94:g:IJIAAOSwHytjFw-5&amdata=enc%3AAQAIAAAA4JvYcLvyZOvlzYBIdfsejv7gVecYn%2F7RdOfLErvDc%2BGcL0nPyxpvj9TFE2aIiGM91sqrGy9Wxgien0fmDsy8bJNkAS5L12RpN3p8CPgu2tfIapEayshjrrX0hqnSV88xxqcjkPKUrlM3o9t4rauYFVZ3Bm%2FpYUB9chCsj0Qk8ymnhqiCtZzDxlhKQq29DM%2BMumAVaNK3HqnxTC9bysXHeFfrmSAkQ5ccA6QBlmPffROvFs9NpPydvstGk9ANrclKHScvyrUWQ%2FrvfhGj0VeG5JIOdiohQJqjIDCMBVAZ3wT4%7Ctkp%3ABk9SR8bGgOH3YQ Any help deciphering all this would be appreciated