Checking The Battery Capacity; Service Life And Warranty; Service Life And Warranty Of The Drive; Service Life And Warranty Of The Battery - Bosch Drive Unit Speed Manual Original

8.4.2 Checking the battery capacity

If you press the red Push button for five seconds, the LEDs
show the current capacity of the battery.
DISPLAY
••••• 5 LEDs light up
••••
4 LEDs light up
•••
3 LEDs light up
•• 2 LEDs light up
•
1 LED lights up
1 LED flashes
¡
› The range of the battery is less in winter due to
the lower temperatures. Only move the battery
(from the warm room where you store it) and fit
it on your Pedelec just before you set off. This
will help to prevent the effect of the low tempera-
ture on the range of the battery (➠ Chapter 8.5.2

"Service life and warranty of the battery").

› If you have run the battery all the way down to
empty, the system switches off completely. In
this case, the NuVinci Harmony gears no longer
function either. After five minutes, the battery
will have recovered and you can switch the sys-
tem back on again. The display functions once
more. From now on, please only ride in the mode
"no assistance/stand by". At this point you can
also operate the gears once more. In this way,
you can ride for another hour until the bat-
tery finally switches off. Attention: The battery
switches off as soon as you begin to ride using
the power-assist mode once more.
8.5

Service life and warranty

8.5.1 Service life and warranty of the drive

The Impulse centre motor is a durable maintenance-free
drive. It is a wear part with a two-year warranty. As its
power output is higher, wear parts such as the drive and
brakes are subject to higher loads than they would be on a
normal bike. Due to the greater force acting on the compo-
nents, wear is more pronounced.
CAPACITY
100-97%
96-80%
79-60%
59-40%
39-20%
< 20%
8.5.2 Service life and warranty of the battery
Batteries are wear parts. Wear parts come with a two-year
warranty.
If the battery develops a fault during this period, your
specialist cycle shop will of course replace it. Normal age-
ing and battery wear do not constitute a fault.
The service life of the battery depends on different factors.
The most important wear-relevant factors are:
• the number of charging processes
After 1,100 charging cycles, your battery will still
have 60% of its initial capacity, providing it has
been well looked after. This means 6.6 Ah in an 11
Ah battery, 7.2 Ah in a 15.5 Ah battery and 10.2 Ah
in a 17 Ah battery. A charging cycle is defined as
the sum of the individual charges until the charges
reach the overall capacity of the battery.
For example: You charge the battery with 5 Ah on
the first day, 2 Ah on the second day and 4 Ah on
the third day; the sum is 11 Ah. The battery has
thereby completed one charge cycle.
From the technical standpoint therefore, the bat-
tery is exhausted at this point. Providing you can
still cover the journey distances with the remaining
battery capacity, you can of course continue using
it. If the capacity is no longer sufficient, you can
take your battery to a specialist cycle shop who
will dispose of your battery and sell you a new one.
• the age of the battery
A battery also ages during storage.
An 11 Ah battery with lithium-ion cells loses around
4-5% of its initial capacity each year. A 15 Ah bat-
tery with lithium-nickel-cobalt-aluminium-oxygen
cells around 2-3%.
This means: Even if you do not use your battery, its
capacity reduces. With everyday use, you can ex-
pect the battery to age by approximately 3-5% per
year as a result of ageing and charging processes.
You can extend the service life of the battery
•
by fully recharging it after every journey, how-
ever short. The Impulse Li-ion battery has no
memory effect.
You can also extend the service life of the bat-
•
tery by using the assistance selectively. Ideally,
you should ride in low gears with a high pedal-
ling cadence.
VI User Manual | Impulse Ergo Pedelec 31