Batteries for bikes and e-bikes

Range Extender Mahle: how much extra range

The lightweight e-bikes powered by Mahle hide a battery of about two hundred and fifty watt-hours in the diagonal tube. The range extender shaped like a bottle adds up to two hundred eight, almost doubling the energy on board, with a weight of around one kilo six hundred. The one hundred eighty-five watt-hour version, more compact, is aimed at those looking for a lighter option. The extender connects to the charging port of the frame and attaches to the bottle holder using the provided mount and silicone straps: you take it on a long ride and leave it in the garage the rest of the time.

Other electronics

Bike electronics also come in various forms:

• Smartphones and Accessories.
• GPS.
• Lights.
• Sensors and Radars.
• Home Trainer.

All the electronics can be found on the electronics page.

Sram AXS battery and SP Connect battery: two uses

The Sram AXS battery, common to eTap and AXS transmissions, weighs about twenty-four grams and clips onto the derailleur without tools. A full charge takes around an hour on the dedicated charger, and the manufacturer claims about a thousand kilometres of range. Both the front and rear derailleurs use the same battery, so a charged spare unit can help either one. The wireless SP Connect battery attaches onto the brand's phone mount and charges the device wirelessly while it displays the route, with no cable dangling in front of the handlebars.

Charging and storing a lithium-ion battery

Bike batteries use lithium-ion cells, which are sensitive to extreme temperatures. They should be charged in a temperate room, never right after a ride in very cold weather or in direct sunlight. For winter storage, keep them around half charged, in a dry location, checking the level every two or three months to avoid a deep discharge. A battery that has fallen, is deformed, or heats up abnormally should not be charged again: it should be taken to a collection point, as these cells should never go in regular waste.

Deals

Good deals can also be found in the deals, promotions, clearance, sales, and the Black Friday. The new arrivals showcase the latest collections, and items shipped in 24h are prepared and sent within 24 hours. The highlight periods of the year follow a stable order: the Black Friday at the end of autumn, the year-end holidays, the winter sales, the French Days in spring, then the summer sales and back to school.

Frequently asked questions

What do the volts and watt-hours of an electric bike battery mean?

The voltage, usually thirty-six or forty-eight volts, should match the motor and its controller. Watt-hours measure the stored energy: the higher the number, the greater the range, at equal assistance levels and routes.

Does a Mahle range extender fit on all electric bikes?

No, it only works with Mahle systems designed to accommodate it, connecting via the charging port. Check the motor reference of your bike before choosing between the two capacities offered.

Should you remove the battery from an electric bike for transport in a car?

Yes, on a bike rack, you should remove the removable battery to lighten the bike and protect it from shocks, rain, and dust. It travels in the cabin, secured and shielded from heat.

How many charge cycles can a lithium-ion battery handle?

You typically get several hundred complete cycles before a noticeable drop in capacity. Partial recharges, without waiting for the battery to fully deplete, help preserve the cells and extend their lifespan.

How can you tell if a Sram AXS battery is charged?

Pushing the button on the derailleur lights up an indicator: green when the charge is good, red when it is low, flashing red when it needs charging soon. Remember to check before each long ride.