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20 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 ...
Criggie's user avatar
  • 125k
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 ...
mattnz's user avatar
  • 50.9k
19 votes
Accepted

Does anyone make dummy batteries for eTap AXS derailleurs?

Talk to the bike shop where you got the bike. The bike should have come with this as part of a kit that includes the charger and 2 little plastic battery protectors. The color is red, of course. ...
Gary's user avatar
  • 306
15 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 ...
Andrew's user avatar
  • 958
14 votes

Does anyone make dummy batteries for eTap AXS derailleurs?

I've never handled one of these, but it looks like you could take the battery off, put a small piece of electrical tape over the contacts, and put it back on. If you have to cut the tape in a fiddly ...
Chris H's user avatar
  • 59.7k
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 ...
RoboKaren's user avatar
  • 29.2k
12 votes
Accepted

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 ...
RoboKaren's user avatar
  • 29.2k
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 ...
Benedikt Bauer's user avatar
11 votes
Accepted

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 ...
Gabriel's user avatar
  • 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 ...
Adam Rice's user avatar
  • 30.1k
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 ...
Chris H's user avatar
  • 59.7k
10 votes
Accepted

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 ...
Nate W's user avatar
  • 9,272
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 ...
Chris H's user avatar
  • 59.7k
9 votes
Accepted

Why are there no/very-few bicycle-specific lights with replaceable 18650 Li-Ion batteries?

Technical reasons: It’s harder and more expensive to design and manufacture a sturdy, lightweight, waterproof case which can be opened by the user. It’s also harder to design and manufacture spring ...
Michael's user avatar
  • 27.8k
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 ...
bertie's user avatar
  • 385
7 votes

Bicycle computers with nonvolatile memory

I am also searching for a computer with non-volatile memory. Following Sigma computers retain data: BC 14.16 BC 16.16 BC 14.16 STS BC 16.16 STS BC 23.16 STS BC 10.0 WR BC 10.0 WL BC 12.0 WR BC 12.0 ...
kuzavas's user avatar
  • 200
7 votes
Accepted

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 ...
mattnz's user avatar
  • 50.9k
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 ...
juhist's user avatar
  • 19.1k
6 votes
Accepted

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 ...
RoboKaren's user avatar
  • 29.2k
6 votes
Accepted

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 ...
wski's user avatar
  • 1,175
6 votes
Accepted

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 ...
RoboKaren's user avatar
  • 29.2k
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 ...
Michael's user avatar
  • 27.8k
6 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 ...
Criggie's user avatar
  • 125k
6 votes
Accepted

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 ...
Criggie's user avatar
  • 125k
6 votes

Find replacement battery for this e-bike

That battery case is a common form factor, often called "ebike battery case 03". Based on labels, your battery has 36 V voltage and Li-ion chemistry. Same case type batteries are still sold ...
jpa's user avatar
  • 1,857
5 votes
Accepted

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 ...
Cearon O'Flynn's user avatar
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 ...
mattnz's user avatar
  • 50.9k
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 ...
Criggie's user avatar
  • 125k
5 votes

eBike: use 48v motor with 36v controller and battery

You’re quite likely to burn out the new wheel by running it on a lower voltage than what it is specified for. Power dissipation is I^2 * R For a given motor power output the amount of current (I) is ...
Warren Burton's user avatar
5 votes

Why are there no/very-few bicycle-specific lights with replaceable 18650 Li-Ion batteries?

As Criggie notes, there are plenty of flashlights using such batteries, and I find some make excellent headlights. I've mounted such lights to my handlebar and/or to my helmet. The characteristics I ...
Armand's user avatar
  • 2,835

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