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Another name to watch out for is Sinowatt, I have seen no comparisons yet but could be another pretty good China manufacturer. Again they have a 2500mah 20a cell.

Life cycle will be the telling point Biily, though they already win hands down on price.

Another big China name is Lishen Battery there 21700 LR22170SD is a10a 4800mah cell could be a good one, there 4500 LR217OSF 13.5a cell was highly rated against the competition.

AT some stage bike batteries may end up using China made factory cells or the lesser mediocre branded cells as the premium cells become less attractive or availability becomes even scarcer then they are which is non existent at the mo. For diy battery builders there are some pretty good China...

How much longer and controller current rating. Generally 14awg up to 32a.

Yes when deciding on a particular battery esp 10/12/13s x 2P then the cell used needs to be checked out and that it can deliver the current. I made own drinks bottle battery 12s2p, I have used genuine LG hg2 25a 3000mah rated cells for my 20a max discharge. Theoretically though even at my low...

Brakes rotors if catching can make a tick noise, spokes don't need to be loose to make a noise. Without a short film it is hard for anyone to come to any conclusion.

The two smallest lightest types would be the two bottle examples in the links. 36V 8.7AH E-Bike Battery Water Bottle Type 36V Lithium ion- Battery Only | eBay LED 36V 5Ah 9Ah Lithium Mini Bottle Ebike Battery for 200W-500W Electric Bike | eBay Buying from Aliexpress might be cheaper or if...

I have had some items delivered recently and yes about 10 -14 days tends to be the norm.

10ah typically should bet around 35miles but if only shorter rides then something smaller will suffice. For light one really wants 10 2p or 20 cells nut the cells need to be the best so cost then rears it's head.

The dumb batteries can use four of the pin a pair obviously for discharge and a pair for on bike charging, some of the battery carriers have a charge point on the base because the battery charge point may be covered or awkward to connect to when on the bike.

Yes most are 50v the dual ones are 63v rated and some older 36v controllers have had 63v caps.

Most will find it personal what may suit there sit bones. Brooks are regarded well but at a cost. Locally on my town bike I have a charge spoon for comfort but tried it on a long ride and it became not so. Other wise I use lidl saddles which are good value and can ride 160k before I get any...

Battery case designs come and go, nothing is very universal for too long. The silver fish battery design though has been around for a good dozen years, it is a behind the seat battery design but there is no reason one cant fit it elsewhere. The hailong for instance can be confusing there are...

You flecc are a wise old owl and a voice or reason knowing your limitation's, through your self constraint one has made the rightful and correct decision and imposed this. Sadly other folk don't realise or admit it isn't safe for them to continue but still do so.

If no frame clips cam with the bike simply buy some double sided velcro.

If it's once per rotation then look at the brake rotor could be the pads rubbing order not unheard of a warped rotor. Other possibilty is/are spokes not correctly tensioned.

To me it appears your logic is correct. Does the bike have a throttle ?

Which controller ? How about a link ?

Yes bottom bracket, most BB and controllers are paired up as the BB & controller software will all differ.