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you can't cut down to much less than 36V 10AH because the battery has to be strong enough to provide maximum power you need for hills. A 36V 10AH = 360WH can give you about 360W * 1.5 max, about 500W without overheating. If you half that, like using two Bosch 36V 2AH tool batteries, you'll...

If your priority is lightweight, then consider a bag battery and keep the controller inside it. For your 18 miles, you would need 36V 10AH to avoid range anxiety. A typical lightweight kit is thus something like Aikema 85SX with 36V 10AH (2s10p in 21700 5000mAH cells), 15A controller, the lot...

I think she knows of the difficulties but did not want to broach the subject. The problem is it's expensive to stay at the top table and the indigineous population steadily gets older and fatter. It's been a generation now that we rely on immigrants for growth.

now that Truss' economics is announced, government will borrow lots and lots of money to pay more than half of our energy cost in the hope that those energy companies are going to invest in the UK, let interest rate and inflation rip by market forces. She reminds me of Norman Lamont when the UK...

I do sell batteries on their own but my prices are not competitive compared to those on amazon or ebay. I use only Samsung and Panasonic cells and SANS chargers. It's the kits that I sell only with batteries unless you already have one from us and need a second identical for a second bike. This...

LiFePO4 batteries for powerwalls are specified for 20 years / 6000 cycles, about right for powerwall applications.

Wasn't it true that HP was started in a garage of their founders? inside the HP200A, first commercial product hand built by the two founders: that was well before they shifted production to China.

there is a small but inherent risk of fire with anything electric, from your toaster to your fridge, TV, washing machine, laptop etc. The fire risks of e-bike batteries attract more attention because of the larger amount of heat produced by the batteries. You need to be careful with batteries so...

Adding to the issues that NealH mentioned above, recelling is difficult to scale up.

the situation of a large organisation such as ebay, amazon and Philips is substantially different from smaller ones. 1. freight cost. Small organisations have to rely on the post office. Sending a first class large letter (100g) to EU tracked and signed: £8.65, send in a motor wheel to France...

the cables won't cause a problem if you go for a BBS01 kit. Still, you have the option to fit a rear hub if you so wish.

it looks like you have standard 8mm quick release on the rear wheel. Can you take the rear wheel out and take a picture of the dropout?

It's not so much certification as whether the supplier is still in business or findable in case your battery goes wrong or causes an accident. Battery cells are certified if they come from big brands like Samsung. Battery transport carton needs to be certified compliant but not curiously the BMS...

You want 3500mAH 18650 cells or 5000mAH 21700 cells. They are good value for money at the moment.

You can't fit hub motors without dropouts. Post some pictures, we'll advise.

they are coming down rapidly in price. You only need about 10-20KWH. They will come down to about £2,000.

I reckon those PV charging points have local storage battery, the PV charges the battery, the battery charges the car with additional supply from the grid. If you assume the daily usage of 40 miles, you'll need something like 10-12KWH every day to top up your battery, that's doable for a...

that battery is in 13S5P, 65 cells. It's good for 48V TSDZ2 but it's bulky and heavy.

they got us already, our only choice is to pay now or later and there is little difference between Labour's and Conservatives position at the moment. I saw Ed Miliband on TV this morning. He waffles a lot as usual but has nothing new to say. The only way to cut the bills is for people to...

the SWX02C is usually built to double walled rims with 13 gauge spokes, left and right elbow in and in 1-cross pattern. Spoke length for your rim: 235mm in that case. You can use 14 gauge spokes with the same length if you keep to left and right elbow in, 1-cross. If you want to change the...