UPDATE: DO NOT BUY. Although replaced by a later model, I would not recommend a B’Twin electric folder. You cannot get reliability and range at this price. The bike has gone back to the shop for a refund. See below for why.
The other electric bicycle
As a counterbalance to the snarking from people concerning e-bikes being a form of “cheating”*, I like to enthuse about them whenever I can. It took a year or so, but eventually my wife couldn’t resist the siren call.

The difference between us, though, is that while I was willing to spend around £3k of money-I-didn’t-have on my Kalkhoff, my Mrs will only spend a smaller amount of money-she-does-have. For me, I could have spent £1k, but I didn’t have that money, either, so whatevs.
So, with budget being an issue, she wasn’t ever going to get the bike I’d picked out for her in my money-no-object fantasies. (That, by the way, would be something like the Riese and Müller Nevo, in a build with a carbon belt drive and a hub gear – which would cost between £2879 and £3779 ) So, to Decathlon we repaired, and considered their range of reasonably-priced (and, to be fair, quite well reviewed) e-bikes. If you’re on a budget, they’re not bad.

Bonus fact: the French government offer an up-to €200 refund, in order to encourage fitness and cycling.
Bonus bonus fact: Decathlon seem to have added this into the € price, because the one she got is just £599 in the UK.
Decathlon offer a town bike style model, the Elops, with a rear hub motor and a couple of price points, based mainly on battery size/life. But the model that caught my wife’s eye, not just because of its price, was the Hoptown 500, a folding electric bike. (https://www.decathlon.co.uk/C-811556-electric-bikes)
The Hoptown comes with a 6-speed Shimano drivetrain (derailleur), ergonomic grips, a gel saddle, and built-in front and rear lights. It has a 6Ah battery that gives a relatively small range of 15-25 km, which is good enough for going around town and for a short commute. If you have facilities for charging the battery at work, you could commute longer. For reference, my Kalkhoff’s enormous battery is around 13Ah, I think, so twice the capacity. And – because I am cycling fit – I’m getting up to 72 km (45 miles) of range on Turbo mode, which is the highest level of assist. So I can go to-and-from work (24 mile round trip) twice on a charge – possibly having to drop it down to Sport mode for the last bit.
Now, the idea that a normal person would be able to lug this Hoptown thing onto the train and commute with it is laughable. It still weighs a lot for a folding bike. But for an electric model, it’s relatively lightweight. Furthermore, whereas my bike is too heavy to go on the car without the addition of an expensive tow-bar and platform bike carrier combination, the Hoptown actually folds down small enough to go in the boot of the car. It was even possible to load up all our summer holiday luggage (including art equipment, a guitar and amp, and the usual bags) and still get the Hoptown into the boot.
So. It’s an ideal solution for someone who wants to buy an e-bike and use it in two locations.
A test ride in the Decathlon car park was arranged, and, happy with it, we set off home with it in the boot.
Not so fast. The only model they had in the shop was the display model, and they couldn’t find the charger. Huh. So an employee drove over to the next town’s store (Montbéliard is just 22km from Belfort), and brought over another model, giving us the charger from that. Visions of Decathlon robbing the charger from Peter to give it to Paul until the end of time.
A few km from home, I dropped my Mrs off with the bike, and left her to ride into Giromagny and then home. This would be a good test of the bike, as the journey from Giro to Auxelles involves at least three pretty hard climbs.
Not long afterwards, she phoned me to complain that the bike’s motor had cut out. I drove out to meet her, and encountered some strange behaviour. Getting on the bike myself, I set off pedalling and the motor kicked in. And then failed again.
So the excuses started. It must be that the battery, which appeared to be fully charged in the show room, was still awaiting its first overnight charging cycle. Batteries are really the most vexatious aspect of modern life, aren’t they? We left it on charge overnight, and the next day fired up the bike again for Maiden Voyage Part 2: I Tell You, This Ship Is Absolutely Unsinkable.
Worked for a bit. Failed. Worked for another bit. Failed. Seemed to work again after using the brake, as if the brake was a switch that turned the motor on and off. Huh.
So we phoned Decathlon and arranged to take it back. The brake-switch thing wasn’t supposed to be a thing, they said.
Since they had the bike they’d “borrowed” from Montbéliard, they gave us that one instead.
So, new bike, new battery.
No problems.
Back in the UK, the bike is deployed, and the manual informs us that the battery will reach peak efficiency after 5 charge cycles. So we deal patiently with the foibles. Sometimes the motor just cuts out. You stop, and turn it back on again, and off it goes.
One of the issues with the building-to-a-budget thing is that you miss out on what turn out to be very useful features. My Kalkhoff’s display tells me how much battery is left, how far I can go on it, and so on. My lights stay on for a few seconds/minutes even when the motor is switched off. The Decathlon’s built-in lights go off when the motor does, so if you’re riding in the dark/fog on a country lane and the motor randomly cuts out, you become invisible to traffic.
Nevertheless, it mostly seemed to be working okay. So my daughter borrowed it one morning last week to ride to work/school with me. A proper test, because it’s a 50-60 minute ride on country lanes, and about 13 miles. It seemed to go quite well, with the motor cutting out only a couple of times. Not bad! (Number of times my Kalkhoff motor cut out: 0.) Again, we made excuses. It cuts out when you’re going faster than 25kph, and to save battery it switches off? Maybe? Or it’s perhaps overheating on the hills and needs a cooling off period? Or, actually, this was a really long ride for the quoted range of this bike, so the battery was probably on its last legs by the end.
Anyway, we got there, taking about 10 minutes longer than I normally do on my bike.
Took the battery out (it’s not very big, with limited range), put it on charge, and then put it back in for the ride home. The light on the charger was green, indicating a full charge.
And this is where the problems began. The motor cut out on my daughter a lot on the way home. It seemed to happen whenever she hit a bump, but it also happened at inopportune moments: at the bottom of a steep hill, usually. So we nursed it home, sometimes having to fold and unfold the frame in order to re-engage the battery, and the excuses stopped. This thing, just like the first one we had, was faulty.
Two for two.
Luckily, Decathlon is an international retailer, so we took it over to our local store and left it overnight. 24 hours later, they called back to say that the battery had been faulty, and they’d replaced it.
So now the bike is on its third iteration, but here’s the thing.
Riding an e-bike is a pleasure. It puts a smile on your face. It’s like cycling, but without the suffering. Think about that: it’s all of the pleasure of cycling (including good cardio exercise, because you are pedalling) without any of the protestant work ethic nonsense about suffering and pain. It’s better than driving a car. You feel good, you enjoy the sunshine and the countryside, you arrive at your destination only mildly perspiring and able to go about your normal day without wobbly legs.
But if you have a constant nagging anxiety that the thing is going to randomly let you down at the bottom of a hill? Not so much.
So I have my fingers crossed that my wife’s latest bike and battery combination will be reliable, but I don’t think I’d want to risk my daughter riding to school on it. Because it’s a long ride home on a heavy bike with no assistance.
UPDATE: In the event, the replacement battery caused problems almost immediately. It arrived with a full charge, but then when we plugged it in to charge it up, the LED indicator on the charging unit remained green. So I removed the battery from the bike and tried to charge it off the bike. This seemed to be working (red indicator, changing to green after a few hours), but as soon as my wife tried to ride it: fail. All of the same symptoms we’d seen before, so we took it back to Decathlon for a final time, and got a refund. Note that the £600 refund did not cover what she actually paid for it in € (given exchange rate and transaction fees).
The verdict
This ought to be the entry level for a lot of people. Once you’ve ridden an electric bike and felt that push in the back and the wind in your hair, you don’t want to stop. They are A Good Thing. But, if you can afford to spend more, you should. Get more range. Get a mid-drive motor (situated around the pedal cranks), get something German or that £4000 Trek Supercommuter. Spend upwards of £2k and you’ll be a lot happier.
My wife is actually going to order a bike costing twice as much: the Raleigh Stow-E Way (2017 model shown above, reviewed here), which will be arriving, hopefully, in early October. Watch this space. It looks like a much cleaner design, and has the battery behind the seat post.

*If an e-bike is cheating, then so is driving any car that is not a fucking Hamleys pedal car.