Unexplained battery drain

Eddieriff

New Member
Region
United Kingdom
I have a turbo vardo sl eq, bought new 6 months ago
Before a 20 mile ride (1hr 50min) Mission Control was showing 100% battery charge, 100% battery health.
At the end of the ride with NO motor assistance the battery charge had dropped to 91%. How come? Surely the lights, Bluetooth, software etc don't drain the battery that much. Help, comments please.
 

Stefan Mikes

Well-Known Member
Region
Europe
City
Brwinów (PL)
I have a turbo vardo sl eq, bought new 6 months ago
Before a 20 mile ride (1hr 50min) Mission Control was showing 100% battery charge, 100% battery health.
At the end of the ride with NO motor assistance the battery charge had dropped to 91%. How come? Surely the lights, Bluetooth, software etc don't drain the battery that much. Help, comments please.
You need to visit your LBS. Any diagnostics from Mission Control?
 

Eddieriff

New Member
Region
United Kingdom
Thanks for your quick reply. I'm new to the group, not familiar with the abbreviation LBS, sorry.
'Diagnose' showing nothing unusual, I think
 

Handlebars

Well-Known Member
Region
Canada
I have a turbo vardo sl eq, bought new 6 months ago
Before a 20 mile ride (1hr 50min) Mission Control was showing 100% battery charge, 100% battery health.
At the end of the ride with NO motor assistance the battery charge had dropped to 91%. How come? Surely the lights, Bluetooth, software etc don't drain the battery that much. Help, comments please.
Try a simple test?
Charging it to 100% unplugging immediately and let it sit for 2 hours. My battery will now drop some just by sitting.
Then try letting it sit for 2 hours turned on with lights on.
After I charge to 100% I can watch it drop 2% by turning it on and with one pedal movement. ( different bike from yours)
 

Eddieriff

New Member
Region
United Kingdom
Updated to the new version of Mission Control yesterday, so that might solve the issue. Local Specialized dealer is not far away.
 

Handlebars

Well-Known Member
Region
Canada
Thanks, I'll try that tomorrow
I've not been able to account for the way my battery behaves, but it still works well. It seems to drop % fastest from the 100% than any other % starting point. Pretty weird, because it should drop the least from there. I surmise that some cells are weaker.
 

Alaskan

Well-Known Member
I don't use the system integrated light on my Trek Allant 9.9+S It is extremely bright and has a killer high beam. It is supposed to have an automatic blinking daylight mode. Unfortunately it only works when you have the unfiltered sun directly behind you and but at no other angle or with any clouds in the sky. It gets extremely warm, verging on hot, to the touch and consumes close to 10 of my battery power relative to the amount used in assisting the rider. I have resorted to a supplemental rechargeable mounted to the handle bars and only use it at night which is in frequent for me anyway.

I am not familiar with which light you have installed on your Turbo Creo but you might look into the light as a possible culprit.
 

Eddieriff

New Member
Region
United Kingdom
After installing the Mission Control update the battery went up 1% to 92%. Left the bike 48 hours and the battery held at 92%. Switched the bike on today and was planning to leave it on for 2 hours. However, to save the battery, it switches itself off after 15 mins. In that time the charge dropped to 90%. I keep the bike in a spare bedroom btw. Hoping to bike to the dealer tomorrow.
 

Catalyzt

Active Member
Region
USA
This may just be the way battery tech works. I think the readout on my new bike (it's in the shop being assembled) only shows four levels of charge anyway, which is good for me, because I'd get very worked up trying to figure out why it dropped 5 percent in this situation and only 3 percent in that one.

On one blog I found somewhere, some engineer was raving about pretty significant passive battery drain when batteries are turned on even when the motor is not in use. He recommended shutting the battery off completely when you're on a long downhill-- or even stuck at a traffic light, which seems crazy!

When I hypermile my Trek 920/Clean Republic Hilltopper front hub conversion, I do shut the battery off completely during one long downhill stretch and on another long flat stretch. Hard to say, because I have no meter or display of any kind on the bike, it's a bare-bones 250W conversion with a tiny 5.4 Wa battery, but I do think I get better range by shutting off the battery when I'm not using it-- I can get 16 miles out of a 12-mile battery instead of 14 or 15, and that includes over 1,200 feet of vertical.

But I'm kind of OCD with hypermiling just in general. My second car is a 1991 Honda CRX that still gets 49 MPG even on runs when I might hit 90 MPH while passing... it loves to cruise at about 79-81 MPH, and if I can maintain a steady speed, I can still get nearly 50 MPG. I like to bike the same way-- high top speeds occasionally, but the most efficient cruising I possibly can.
 

Eddieriff

New Member
Region
United Kingdom
The bloke at the shop thinks the battery drainage is "not too excessive, keep your eye on it. Bring it in for the six-month service next month".
 

Eddieriff

New Member
Region
United Kingdom
This a response I received from Specialized Rider Care:-

The Turbo team have looked at the ride data you kindly sent over and have confirmed when running your bike with no assistance from the motor but using the lights, TCU and tracking the battery usage that of 9% over a 1hr 50m is normal. The lights used on the Vado SL are quite powerful (around 650mA) and therefore will be the main draw of the battery consumption when riding your bike with no motor assistance and the battery consumption of 9% you have seen is to be expected.

Ed
 

stabilo

New Member
I sometimes do 90 mins without using assistance just lights / bluetooth and it doesnt drop more than 1 or 2 %. Vado 4 sl bought Sept 2020. UK owner. Bike kept in gararge.
 

Alaskan

Well-Known Member
I sometimes do 90 mins without using assistance just lights / bluetooth and it doesnt drop more than 1 or 2 %. Vado 4 sl bought Sept 2020. UK owner. Bike kept in gararge.
There are lights and then there are LIGHTS. They are not all created equal. Some are very bright and use more energy, others not so much.