| Table of Contents |
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Specifications
| Specification | Details |
|---|---|
| Manufacturer | Hero Eco - https://heroeco.com/ |
| Bike Web Site | https://www.f4wbikes.com |
| Model | FAST4WARD Peak |
| Model Year | 2012 |
| Price | $1,799 USD |
| Category | Mountain Bike / ATB | - |
| eBike Type | Pedelec | up to 20 mph |
| Frame type | male |
| Frame size | , |
| Weight | 46 lbs |
| Range | 37 miles * (60km) |
| Engine | |
| Engine Position | rear hub |
| Engine Power | 250 Watt |
| Assists until | 20 mph |
| Battery Type | Lithium-Ion |
| Battery Characteristics | 324.00 Wh / 9.00 Ah / 36.00 V |
| Range | 37 miles (60km) |
| Gearshift/Brakes | |
| Gearshift Type | derailleur |
| Gears | 8 |
| Gearshift Brand | Shimano Alivio |
| Brakes Type | V-Brake |
| Suspension | |
| Suspension front/rear | Yes / No |
| Tires | |
| Size | 26 x 1.75 |
Battery
Sony 36V 9Ah Lithium Ion 324 Watt Battery
...
| Capacity | Expected | Actual | Percentage |
|---|---|---|---|
| Ah | 9 Ah | 2.6 Ah | 29% |
| Wh | 324 Wh | 93 Wh | 29% |
Disassembly
New Battery
Configuration
10s4P
Layout
...
Rebuilding the Battery
New BMS
Max Housing Size - 100mmx65mm
Current BMS
Anchor
Circuit
Capacity Test
Capacity | Expected | Actual | Percentage |
|---|---|---|---|
| Ah | 9 Ah | 9.24 Ah | 103% |
| Wh | 324 Wh | 334 Wh | 103% |
Battery Rebuild
...
Why?
The battery kept shutting off a lot. Seemed to be happening when pulling a large amount of current. Must be a battery/bms issue.
Testing the cells showed that they were within spec.
...
When disassembling the battery, I noticed a wire with exposed copper. I assumed I hit it with the razor blade when taking it apart but it may have pre-existed.
Ordered a new Smart BMS with Bluetooth which might help diagnose future issues. See Bluetooth BMS.
Repacking
Bluetooth BMS
aliexpress.com - C$23.63
...
The battery would turn off when pulling higher currents. If I was easy on the throttle, I could get it to stay on.
Decided to rebuild the battery. See above.
References
| Reference | URL |
|---|---|
| F4W Peak 350W electric bike | https://www.f4wbikes.com/#!peak/cee5 |
| F4W (Fast4ward) Peak 350W Electric Bike Review | https://electricbikereport.com/f4w-fast4ward-peak-350w-electric-bike-review/ |
| Details | https://www.greenfinder-mobility.com/e-bikes/brand/fast4ward/#/product_preview/1375 |
| Review | https://www.youtube.com/watch?v=1bcUQ2ykW_M |
| How to install a Brushless DC Controller on Ebike: The missing manual | https://www.youtube.com/watch?v=PuwnFMHHtaE |
| Increase speed of ebike: Swagtron EB5 controller upgrade | https://www.youtube.com/watch?v=QbsPzjG-QpA |