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Trust me thats a lot of miles! All the points in your post are excellent - thanks. You are correct about the Grin charger being expensive but I do have several e-bikes in my household so it may be of value to me as it would simplify the charging equipment and possibly be more accurate than my...

I am concerned that the 4wh per mile seems low as I do not class myself as a powerful cyclist. As the weather improves I will be using the e-trike more so will collect more data which I'm happy to report. I will try and collect more data points to enable the plotting of voltage to Wh used. My...

The Watt meter is fitted to the charger and I have recharged my battery to full as indicated by the LED turning green on the charger. To recap following my first charge I rode 76 flat Lincolnshire miles mostly on road and was wondering why the battery display was still showing five and half...

Great post. Your use of a voltmeter appears to be the only meaningful way to assess the charge status of the battery i.e. measuring the floating off load value. On load voltages will be all over the place depending on the load. I will be searching my parts bin for some connectors to add my...

Crikey now I feel guilty it seems I've opened a Pandora's box . All I meant to do was express my surprise at how the display of battery state did not appear to be reacting to the use of assistance. If you do take a closer look I would be interested in how the four LEDs on the battery work...

So how does the six segment display of voltage operate on your rides? Does the rate of change of the display accelerate as the number of segments decrease and is there any correlation with what you see on your watt meter? S

The point of my original post was to gain knowledge of how the display operates by comparing what I see with what other users experience. "Very accurate" is an unfortunate term perhaps you would care to specify how accurate and how you know. Also I have two volt meters on my system, the one...

I agree. Its a pity that there is not a similar obsession with efficiency. If my Tongsheng lasts a couple of years I will be happy. After all it is not expensive to replace and unlike some of the big name systems spares are available for a reasonable cost.

Hi, on reflection I should have chosen a better title for this thread, probably "how accurate is the battery charge indicator?" The short answer is "not very". This is confirmed by forum comments and a few reviews like this one. Initially I suspected that a voltage setting in the display...

Not sure I want to know of all the failure modes...... head in sand! However, I will look at adding some extra water proofing / deflection before I venture out in the wet. I have decided that the six bar battery display is not very useful so am in the process of adding a volt meter. I...

Reducing your overall drag is a great idea. Bicycling science (table 5.1) lists the power required to overcome air drag for various cycle types at 22 m.p.h (10m/s): Upright commuting bike 345W, road bike touring position 220W all the way to an M5 faired low racer at 24.2 W so there are gains to...

#Bikes4Two - thanks for the diagram and links which I will file away for future reference. I would prefer not to have to fit a "Watt Meter" just to assess battery charge state. As it happens I remembered I have a similar meter that I purchased with the idea of fitting to a different bicycle...

Thats where I have started but I was surprised how long the battery was lasting. This thread and others has reassured me that the battery is unlikely to suddenly drop from five bars to empty. I will probably use the battery down to 1 bar on the display before recharging. Mind you I do like...

I went caving once as part of a training course I was on. At one point we had to fully submerge to wriggle under a rock wall between two chambers. Never did it again for reasons of cold, wet, dark, mud and the continuous risk of flash flooding from unexpected rainfall up on the moors. Mind you...

So to check my understanding using my 1970s school boy physics... The battery state meter reads 2.6 volts per division in the range 41-54 volts. The 3AH figure is derived by dividing the total battery capacity by the five divisions of the meter 15/5. Plugging the numbers into a spreadsheet...

Thanks for all your responses. I'm amazed at the potential range of my system. Before purchase I was worried about riding power off and what sort of extra range the system would allow me to achieve. Riding power off is not an issue and I usually start out without power just to decrease the...

I went for the large battery because when compared to a bike my trike is quite heavy, however, on the plus side it is probably has less aerodynamic drag than most uprights (upwrongs!) . I have also found myself working quite hard to keep the speed above motor cut off because speeds of 16 and...

Hi, I have just started using a TSDZ2 on my trike and riding in flat Lincolnshire I am surprised at the range it is giving me. So far on my first charge I'm at sixty miles with the battery indicating full. Mind you my knees hurt keeping it above cut off speed. S

Hi, I have recently fitted a TSD2 to my recumbent trike and am presently trying to assess the range I can achieve. At the moment I have been using it in mostly Eco with occasional use of Tour, the lowest two assist modes. I have a large battery 15Ah at 48v, which I hoped would give me fifty...

I have found one of the two cables by searching for tongsheng speed sensor extension cable but my original question stands i.e. what type of JULET connection is being used?