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28 votes
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Protecting bike attachments such as lights against theft

Take the lights and anything else thats likely to be stolen off your bike. For things that can't be removed easily, you may want to use something like Pitlock security skewers (or security bolts) or ...
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  • 45.6k
21 votes

Fortified Bicycle appears to gone out of business -- where to get one of their replacement bike light batteries?

If your light is not sealed, and you can see a battery that looks like this (the colour/color does not matter) then you can pop out all the old batteries and fit new ones. Replace all the batteries ...
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  • 101k
20 votes

Should I buy a spare integrated battery with my new ebike even though I only plan to use it in years while keeping it at 60% charge over that time?

Probably better asked on Electrical Engineering SE. From my RV experience, batteries have a limited shelf life no matter how well they are stored. Shelf life reports vary from 2-6 years (I thought ...
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  • 40.9k
17 votes

Protecting bike attachments such as lights against theft

In terms of accessories like lights, GPS, etc. the only way to be safe is to remove them entirely. Remember that if something is quick-releasable for you, it's also quick-releasable for thieves. Bike ...
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  • 3,783
16 votes

Fortified Bicycle appears to gone out of business -- where to get one of their replacement bike light batteries?

First, hello, and welcome to Bicycles SE. Sorry to hear about your manufacturer collapsing... that's really unfortunate, particularly for a higher-cost item like an e-bike. My guess is that 18350950 ...
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  • 858
13 votes
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Charging eBike Battery with Solar

A 100 watt solar panel is nominal watts under ideal situations. You'll be lucky to get 25 watts tied to the back of your bike - and this would be only for a few hours of the day, from 11a to 3p. Given ...
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11 votes
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Why doesn't my (battery-powered) light work in the cold?

There are two reasons why it might not work: The batteries don't like the cold. Many battery chemistries don't like the cold -- notably alkaline, manganese (heavy-duty), and NiMH/NiCad batteries. To ...
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  • 28.5k
11 votes

Why doesn't my (battery-powered) light work in the cold?

Batteries, especially most types of rechargeables don't work well in cold conditions. The chemical reaction that powers the electric voltage does needs some temperature to perform as intended. If you ...
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11 votes
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E-Bikes - Is it bad for the bike to run out of battery?

Most rechargeable batteries have a certain voltage threshold below which they will get permanently damaged. Li-ion cells should never drop below 3.0V (slightly higher at 3.2V for LiPo). Smart ...
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  • 543
11 votes

Wind (nano-/pico-)turbines installed on bicycles for regenerative charging of batteries?

Hilariously, such a product does exist. It comes from notorious crapgadget vendor Thanko. Note that it only purports to charge two AA batteries, and it's not an efficient way to do that. They make no ...
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  • 24.5k
11 votes

Should I buy a spare integrated battery with my new ebike even though I only plan to use it in years while keeping it at 60% charge over that time?

Li-ion batteries lose some capacity in prolonged storage no matter the state of charge, so I certainly wouldn't buy one now. Apart from the option in mattnz's answer (battery rebuild services, which ...
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  • 47.2k
10 votes
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What is this ... electrical bike's setup? Is there a particular brand or model name for this? how to replace its battery?

It looks to be an older Currie Electro Drive, they were originally made in 1996 i believe. I don't know much to anything else about them though other than that is one and they exist. Here is the ...
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  • 9,061
9 votes

Protecting bike attachments such as lights against theft

Fortified Bike sells bike lights that are designed to be theft resistant. They're made of heavy aluminum and use security screws so most thieves won't have the proper tool to unscrew it. The also ...
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  • 1,779
9 votes

Is it possible to charge an ebike from a 12V solar powered battery?

You can charge it, but you probably won't do as well as you think. You're on the right track but you're missing a couple of things: Solar panel ratings: These are optimistic and assume full sun ...
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  • 47.2k
8 votes

Has anyone successfully changed the battery in a Knog Blinder Mini Dot?

I found this which suggests that you'll have to open it by force - I'd try a razor saw if there's no obvious edge to pry. You may not need to replace the battery - if there's a protection circuit ...
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  • 367
7 votes
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Can I replace my bicycle's dynamo with batteries?

Yes, a battery holder and switch from radio shack would accomplish this. Most dynamos are 6vac and can be replaced with 4xAAs or the 5vdc from a USB pack. You can ignore the issue about polarity as ...
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  • 28.5k
7 votes

Bicycle computers with nonvolatile memory

I am also searching for a computer with non-volatile memory. According to Sigma the computers BC 5.16 BC 7.16 BC 7.16 ATS BC 9.16 BC 9.16 ATS PURE 1 (according to the reply from Sigma customer ...
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  • 200
7 votes

Should I buy a spare integrated battery with my new ebike even though I only plan to use it in years while keeping it at 60% charge over that time?

Stocking up on replacement parts that you might need someday (uncertain) but don't need right now makes sense only in some cases: You suspect the part shortage continues, or you suspect the part will ...
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  • 13k
6 votes
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Shimano Steps E6000 battery charge percentage falls abruptly

This is a sign of an unbalanced pack. One of the cells is weak and under load its internal resistance is increasing and voltage decreasing. Normally this only happens with an old, worn out pack that ...
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  • 28.5k
6 votes
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Bosch battery stopped charging

Here are the indicator lights and reset procedure straight from my Bosch e-bike training manual. Voltage from the charger should be 5V so that doesn't seem to be the problem (See if it matches up ...
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  • 1,165
6 votes
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Ancheer electric mountain bike cuts out under load

Your battery pack is failing under load and your battery management system is shutting off to prevent your pack from going up in flames. A voltage drop like this is often a sign of one or more cells ...
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  • 28.5k
6 votes
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How often should I charge my (lithium) e-bike battery?

I presume Lithium Batteries. TL;DNR - Charge them as often as convenient for you, always making sure you have more than enough to the next ride. Battery chemistry makes a big difference - Older ...
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  • 40.9k
6 votes

KNOG BLINDER ARC 5.5 battery replacement

A quick google search turns up this forum entry by user “RNAV”: https://www.bikeforums.net/electronics-lighting-gadgets/1085170-knog-arc-5-5-battery-replacement.html Remove the trim that surrounds ...
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  • 20.3k
6 votes
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Blind rivet nuts for ebike battery on frame: aluminium or steel?

Personally? For a heavy battery mounted on raised/cantilevered supports, I'd suggest looking at a welded support and forgo rivets completely. If you do use rivets, I'd match the metal to the frame to ...
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  • 101k
5 votes
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Will the Garmin Edge Touring store an in progress ride if power is lost?

Yes A comment below made me wonder could a planned turn off be different to a random turn off like my original answer below. So a quick test this morning and... if you turn it off through the ...
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5 votes
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Is the XTR Di2 battery compatible with Ultegra Di2?

According to BikeRadar, "The battery unit as well as the wiring for XTR Di2 are identical components to the ones used in Shimano's electronic road groups. The battery can be mounted on a bottle cage, ...
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  • 45.6k
5 votes

Protecting bike attachments such as lights against theft

I've attached lights etc. with anti-tamper torx screws and normal screws in awkward places (like under the rear rack). Both have some deterrent value over normal screws in easy-to-reach places, which ...
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  • 47.2k
5 votes

To what extent should I insulate an electric bike battery during winter?

General advice is to store the battery at room temperature and install it in on the bike just before the ride. If the ride is under about 30 minutes the battery will stay warm enough not to be badly ...
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  • 40.9k
5 votes

eBike winter battery power

You're right - a cold battery cannot provide as much power as a room-temperature battery. I had an ebike based on SLA batteries, and in summer it would get 25 km range, which dropped to under 5 km ...
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  • 101k
5 votes

Is it possible to charge an ebike from a 12V solar powered battery?

An additional downside is electrical conversion losses. The solar panel will likely be putting out around 12V at some current, perhaps 5W for a 500 gram panel to 20W for a 2.5 kilogram panel. That's ...
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  • 101k

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