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Quality electric bikes. Inspired by you.

Batteries for Woosh electric bikes

All modern Lithium batteries can last 2-3 years and can be recharged up to 800 times
- the more you use your bike, the stronger is the battery.
- Charge it for 15 minutes evey month if you are not riding the bike.

Most popular batteries:

BatteryBatteryChargerCradle/RackComplete kit
HL 13AH downtube£299£29£11£319
HL 15AH downtube£349£29£11£369
HL 17AH downtube£399£29£11£419
HL 13AH rack£299£29£25£333
HL 15AH rack£349£29£25£383

Mail orders: 01702 435566

Southend main office: for all mail order sales, Southend area demonstrations, pre sales info and post sales support.
42-46 Queens Road, Southend SS1 1NL.
Open Mon-Sat 10AM to 5PM (Sat sales only).

Woosh has 14 models of electric bikes to suit every pocket, from crank drives good hill climbers to foldable bikes with hidden battery for cities like London.
Want to know which bikes would be good for where you live? Try our Predictor.

Battery for Woosh Sirocco and Aspen with keylock
3.5 kgs, 36 Volts (Lithium)
Price including VAT: £260 (10AH including p&p)
Battery for Woosh Sundowner with keylock
3.5 kgs, 36 Volts 10 Amp Hours (Lithium)
Price including VAT: £245 (including p&p)
Battery for Woosh Gale and Sant Ana with keylock
3.5 kgs, 36 Volts 10 Amp Hours (Lithium)
Price including VAT: £245 (including p&p)
Battery for Woosh Zephyr (2 parts) and Zephyr CD
3.5 kgs, 36 Volts 8 Amp Hours (Lithium)
Price including VAT: £225 (including p&p)
Now replaced by one part battery
Battery for Woosh Gallego
1.5 kgs, 36 Volts 7.5 Amp Hours

Price including VAT: £175 (including p&p)
Battery for Woosh Gale and Sant Ana with keylock
3.5 kgs, 36 Volts 13 Amp Hours (Lithium)
Price including VAT: £275 (including p&p)
Battery for Woosh Zephyr-B with keylock
2 kgs, 36 Volts 10 Amp Hours (Lithium)
Price including delivery £235
Battery for Woosh Sirocco 2 10AH with keylock
3.5 kgs, 36 Volts 10 Amp Hours (Lithium)
Price including VAT: £275 (including p&p)
Battery for Sirocco-Sport with keylock
3.2 kgs, 36 Volts 9 Amp Hours (Samsung Lithium cells)
Price including VAT: £245 (including p&p)
Battery for Sirocco-CD and Santana-CD with keylock
4.3 kgs, 36 Volts 15 Amp Hours (Lithium)
Price including VAT: £369 (including p&p)
Intelligent chargers
For 36V Lithium ion batteries, output 42V 2A max.
Various models with different connectors (3-pin XLR, large RCA plug type, laptop co-axial plug type).
With mains lead and UK plug.
Price including VAT: £33 (including p&p)

Battery for other brands
It is very difficult to supply batteries for bikes that do not come from us.
Firstly, although they may look the same, the plastic housing in which batteries are installed varies from bike to bike and brand to brand, so it is likely that our battery will physically not fit your bike.
Secondly, our suppliers ask that we must sell you a charger with one of our batteries as other chargers may damage the battery.
If we sell you a battery it is on condition that we also sell you a charger (£33) and without guarantee.
Please click on the blue button and send us your enquiry via our web page.
Battery enquiry

36V 15AH HL Battery for our 36V kits. Only £369 with charger and UK delivery.

Please note charger currently has UK socket, battaery capacity is 14.5AH minimum, 15AH typical. We cannot sell fitting kit on its own.
Panasonic 18650PF 2900mA cells. Weight: 3.1kgs. Matt Black
(mouseover to magnify)

To avoid fouling against the chainring on some bikes, it's best to mount the battery in the middle of the downtube:

Fitting of the HL battery:
You should check your frame for space and location of the cage bolts before ordering.
- best position for the battery is in the middle of the downtube.
- you may need to drill extra holes on the mounting rail to suit your downtube.
- if the location of your cage bolts do not fit the slots on the mounting rail, you may need to install one or two rivnuts (usually M5 rivnuts) on the downtube.
You don't need any special tool but if you have never done this before, Read this article.
Or watch this video:
In the example below, our bottle cage bushes did not make the job easy.
We have drilled one extra hole in the aluminium base for the bottom right bolt and fit an M5 rivnut to fit the top left bolt:

fitting HL battery

Here the HL battery is used with our GSM CD kit:
(mouseover to magnify)

Dimensions: 361 x 90 x 92 (in mm L x W x H)

36V 15AH Square Bottle Battery for our 36V kits. Only £369 with charger and UK delivery.

Please note charger currently has UK socket and we cannot sell fitting kit on its own.

3.3kgs. Samsung 2900mAH cells. High discharge rate.
With on/off switch.
Battery meter button with 3 green level LEDs and 1 red LED. USB socket for charging phones.
supplied with mounting kit for downtube, lock and 2 keys.
Dimensions: (L x W x H) 39cm by 8.5cm by 13cm at the seat tube side, 12cm at the head tube side.

output port
Samsung 2900mAH cells

Doawnload Samsung cell characteristics and storage recommendations for geeks!
50 cell pack:
High discharge rate BMS (28A):

Maintenance of batteries

In a lithium-ion battery, Lithium ions move from the positive electrode to the negative electrode when charging and vice versa when you ride your bike. In theory such a mechanism should work forever, but in practice, your battery will age with time and repeated charging cycles. To get the best out of your battery, follow the recommendations below:

- Use your battery regularly. Ride your bike as often as you can.
- Don't charge up after every short trips, wait for the battery to go down a bit, best time to charge is when the battery is half full.
- Grease the battery contacts and sliding rails if you have a rack battery.
- Avoid extreme temperatures. Your battery will work between 0oC and 60oC but it's best to keep it at room temperature, between 15oC and 25oC.
- Avoid shocks, very bumpy roads and pot holes.
- Avoid humidity.
Your battery contains a lot of electronic components besides the Lithium-ion cells, humidity will oxydize the copper on the circuit board like it would your copper pipes. Keep your battery dry. If you ride in the rain, give your battery a wipe when you come home.
- If you cannot ride your bike in the winter months:
a) If your battery has an on/off switch, switch it off in winter months.
b) Every 2 months, switch it on and check the battery level.
If still full, give it 10 minutes top up charge.
If one LED has gone off, give it a 30 minutes top up charge.

When well used and maintained, your battery should be good for about 500-700 charging cycles or 4 to 7 years.

Frequently asked questions about e-bike batteries

What are the differences between Lithium polymers (Lipos) , Lithium-ions (Li-ions) and iron phosphate?

Lithium ion is the general category (we just call them lithium batteries), Lithium polymer another name for Lithium ion batteries that are made into pouches and iron phosphate is a type of chemistry used to make Lithium ion.
If you want to be precise, it is better to refer to the battery by their chemistry.
Virtually all current electric bike batteries use one of these two chemistries:
1) LiNiCoMnO2 (commonly called Lithium ion) and 2) LiFePO4 (Lithium iron phosphate).
The word LIPO is often used with two different meanings: the technology of making Lithium ion batteries and RC Lipo (popularized by hundreds of thousands of Hobby King customers).
RC Lipo is never used in our bikes because they are unsafe.
Lithium ion batteries are made by printing over a plastic film (hence the name polymer) with Lithium composite anode and cathode.
The process ends up with a 7-layer film only 15 micron thick (substrate, cathode tab, cathode, electrolyte, anode, anode tab, protection).
This film is then rolled up and packed into either soft pouch (prismatic cells used in our rear carrier batteries) or cylinders (eg 18650 used in our bottle batteries).
About a quarter of the weight of your battery comes from Lithium metal, the rest is mainly plastic and other metals.

Which chemistry is better for electric bikes?

Lithium iron phosphate has a flatter discharge profile but heavier.
We think Lithium ion (LiNiCoMnO2) is now the clear winner because it's lighter.
However, it's the quality of the cells used in your battery that makes all the difference.

What do you mean by C?

C is the capacity of your battery. It's the 10A in 36V 10AH for example.

What is the maximum continuous discharge rate?

This is given usually as 1C to 1.5C, for a 36V 10AH, that means between 10A and 15A.
For a short period, Lithium-ion cells will sustain 3C and iron phosphate will sustain 5C.
This is not very useful information because firstly, there is a 30A fuse on the output and secondly the controller will limit the current to 14A.

What do you mean by CC and CV?

These are charging methods, CC = constant current, CV constant voltage.
The chargers are smart, you must always use the right charger that comes with your bike and battery.
They usually have been programmed to charge the battery with the correct method.
Our batteries require contant current charging (CC) up to the programmed voltage (usually at 2A up to 40V for a 37V battery),
then gradually reduces the current while maintaining the specified voltage (CV) until the current drops to near zero.
During this period, the battery management system carries out the balancing, equalizing the charge between all its cells.
It may change from red to green a few times before finishing, during balancing.
Lithium-ion chargers are thus said to be CC/CV chargers
The charging light on the charger goes red when charging and green when charging is finished

What does the BMS do?

There are always small imbalances between cells because they are chemical devices.
The BMS (battery management system) tries to balance the cells when charging and discharging.
Without the BMS, the battery will have a much shorter life and are dangerous to handle.

Should I run deep charge cycles?

No. This is not appropriate for modern batteries.

What is conditioning a battery?

Woosh batteries do not need conditioning.
But if you still want to do this, charge it up to full before first use then run it to nearly flat but do not stress your battery too much  in the first few days (avoid hills) and put the battery back on charge every night for a few nights.
Your battery works best between 95% and 20%. At either end of the spectrum, the electrodes are stressed by swelling and may produce gases which damage their structure so avoid stressing it if the battery level is already low.

What is the trickle current?

Your battery is a chemical device, it loses its charge through diffusion.
The rate of natural discharge is called trickle current.
On modern batteries, this is around 3% per month but it's better to err on the side of caution, recharge your battery at least once every 2 months even without use.

Should I charge my battery every day?

Only if you ride every day.
Put the battery on charge after you come back from a ride and switch off the charger (from the wall socket) after the charging light goes green.
Batteries like and need to be used. Use it or lose it.

Do you sell replacement batteries for other bikes than Woosh bikes?

In principle no but if your old battery is very similar then we can sell to you but without any warranty because we have no idea whether it'll fit or it'll work.
We will still try to help you out if we can.

Do you sell replacement cells and BMS?

No. But we may if you can prove to us that you have the expertise.
Image of BMS | Battery wiring diagram

Returning a Battery:

If you need to return your battery for any reason, you will need to pack it sufficiently well in a strong box with at least 2 inches of polystyrene and/or bubble-wrap all around.
Not all couriers will carry batteries, so you may wish to use our courier, if this is the case, give us a call on 01702 4335566
Regardless of which carrier you use (ours or your own), you must print out and attach the two labels linked to below to the outside of the package.



Recelling - repacking an old battery

If you want to replace an old battery that is no longer manufactured, you may have to go for recelling, that is to replace the old internal battery pack with a new one.
As technology improves, the new pack is usually quite a bit lighter and smaller.
If you are lucky, the new battery has the same input and ouput panels, your task is made much easier and involes no soldering.
This is called repacking.

The components of a battery:
Inside an e-bike battery, you will find normally a metal shell, an input panel, an output panel and the battery pack that contains the energy cells.
inside a battery: the battery parts
The BMS (battery management system) is packed inside the pack.
The input panel contains the charging socket.
The output panel contains the on/off switch, fuse and output power connector that feeds power to the bike.

example of repacking:

We start here:
replacing an old Elios battery
Remove the handle then the input panel of the new battery:
replacing an old Elios battery
Remove the output panel of the new battery:
replacing an old Elios battery
Remove the battery pack of the new battery:
Carefully push on the edges of the pack to ease it out:
replacing an old Elios battery

Repeat the same above steps to remove the battery pack of the old battery.

Feed the new input panel and new pack inside the old shell:
Stand the new pack vertically, position the old shell above the new pack.
Make sure you line up correctly the top and bottom of the pack with the top and bottom of the shell.
Feed the input panel inside the old shell first.
Gently and firmly slide the old shell over the pack.
The end result looks like this:
replacing an old Elios battery
Refit the 4 screws of the output panel.
replacing an old Elios battery
Fill the void with foam.
The old shell is too big for the new battery pack, cut foam and fill the void inside metal shell.
replacing an old Elios battery
Refit the input panel.
Watch out for the correct placement of the rubber gasket over the lock loop. The gasket is between the lock loop and the shell.
You don't want rain water to get inside.
replacing an old Elios battery
Refit the handle.
replacing an old Elios battery
The end result:
replacing an old Elios battery

Popular cells and their chemistry

NCR-18650 3.6V 2900mAh LiNiCoAlO2
ICR18650 28A 3,75V 2800mAh LiCoO2
ICR18650 26F 3,7V 2600mAh LiNiMnCoO2
ICR18650-30A 3.78V 3000mAh LiCoO2
ICR18650-22P 3,6V 2150mAh LiNiMnCoO2
ICR18650 HA1 3,65V 1300mAh LiNiMnCoO2
ICR18650 HB2 3,65V 1500mAh LiNiMnCoO2
ICR18650B4 3,6V 2600mAh LiNiMnCoO2
NCR-18650E 3,6V 2250mAh LiNiCoAlO2
INR18650 20Q 3,6V 2000mAh LiNiMnCoO2
ICR18650 MF1 3,65V 2150mAh LiNiMnCoO2
INR 18650 29E 3,65V 2850mAh LiNiMnCoO2
NCR-18650B 3,6V 3350mAh LiNiCoAlO2
ICR 18650 MG1 3,6V 2850mAh LiNiMnCoO2
NCR-18650BF 3,6V 3350mAh LiNiCoAlO2
INR18650 MH1 3,7V 3200mAh LiNiMnCoO2
INR18650-25R5 3,64V 2550mAh LiNiMnCoO2
INR18650-25R6 3,64V 2550mAh LiNiMnCoO2
NCR-18650BL 3,6V 3350mAh LiNiCoAlO2
ICR18650 HE4 3,6V 2500mAh LiNiMnCoO2
INR18650-30Q 3,6V 2950mAh LiNiMnCoO2
INR18650 M26 3,65V 2600mAh LiNiMnCoO2
ICR18650-22F 3,6V 2200mAh LiNiMnCoO2