Bosch explicitly state A charge cycle refers to the full recharging of a battery in a single charging session or several partial charging sessions.

https://www.bosch-ebike.com/en/products/batteries/

 

Of course, there may be people on this forum who say that because Bosch state it, it must be wrong. They may even go so far as to say that Bosch say it in order to increase sales of their (inflated price) batteries.

You have a very good point in your comments, that I do not disagree with!!

Andy

These same people may also say the world is flat and 5g masts are the cause of the pandemic....

Very unlikely....Those sort of people don't understand anything to do with electricity either, but they are around everywhere!

Andy

Hi guys, I have a Li-on lithium battery for my Cyclamatic e-bike that seems to be playing up. I need some advise but, as I’m new to this forum, not sure if this is the correct thread to post my query on. Would it be OK to discuss here?

Hi guys, I have a Li-on lithium battery for my Cyclamatic e-bike that seems to be playing up. I need some advise but, as I’m new to this forum, not sure if this is the correct thread to post my query on. Would it be OK to discuss here?

Hi, and welcome. Probably best to start a new thread, you'll likely get more response.

Can someone please clarify best practice for battery recharge. I have Bosch a 400Wh Battery and over winter when not in use I kept it indoors at about 60% charge. Recently I've been doing short daily rides only burning about 15%. Should I always top it back up to 100% before next day or let it go down lower before recharge to 100%. Thanks.

I lifted these from my Kalkhoff Pro Connect's user manual. It is six years old and uses a Li-ion battery. Unless battery technology has changed dramatically, I expect the principles apply to other ebike Li-ion batteries.

• You can extend the service life of the battery by fully recharging it after every journey, however short. The Xion Li-ion battery has no memory effect.
  
• If you continuously run the battery to empty during normal operation, this reduces its service life. Frequent partial recharging of the battery has a favourable effect on its service life. You should therefore partially recharge the battery whenever possible: Do not run the battery all the way down to empty and recharge it even after a short period of operation.
  
• If you do not need your battery for a while, store it at a temperature of +10°C at 50-70% of its full charge capac- ity. If you do not use the battery for six months, you must recharge it.
   
   
   
   
  

• If you do not need your battery for a while, store it at a temperature of +10°C at 50-70% of its full charge capacity.
  

I agree with your points and what that says. There seems to be some discussions about what 'for a while' might mean. Some people suggest a week or so, some more like a month or more, some quite a bit less. We tend to charge ours up fairly frequently and are not typically sure in advance when/how much we might want it (*); so after charge it often stays on 100% for three or four days. Others say its better to charge to 80%, then the last 20% just before you need it.

 

(*) It for us is actually two batteries, one for the tandem and one for the solo we share. We are uncertain about when we will want to use which.

FWIW until recently I hadn’t used my Kalkhoff for over two years due to illness and lethargy. It, and its two batteries, sat in my in unheated garage throughout that time, never touched. They were almost at full charge when I stored them in 2018 and when I first took my bike out a few weeks ago, both batteries showed almost fully charged still. I really did expect them to fail or play up in some way to repay my neglect but having done trips totalling about 80 miles, swapping batts several times and recharging them after each ride, they’ve performed flawlessly (touch wood).

I’ve concluded that good quality batteries are tolerant of less than perfect management, though I intend to take better care of them now I am back in the saddle.