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Kyosho Speed House Multi-Cell Evo...
Kyosho Speed House Multi-Cell Evo...
Kyosho Speed House Multi-Cell Evo...
Kyosho Speed House Multi-Cell Evo...

Kyosho Speed House Multi-Cell Evo Mini-Z Charger

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Kyosho Speed ​​House Multi-Cell Evo Mini-Z Charger


Manual for use of functions for AAA Ni-MH battery (for MINI-Z)
Supported firmware version: OS-1.0.03


All charger settings will remember the last setting the next time you turn on the power, even if you unplug the charger.

Be sure to check the current settings before use. Incorrect settings such as charging current, -ΔV and capacity limit may damage, explode or ignite the battery, which may cause serious harm to your life or body.

If you have any questions about the settings, please use the factory default settings.

[Ajustes del sistema]

■Capacity limitation
「Power off」:Charging continues regardless of charging capacity until -ΔV (cutoff) setting is detected.
「On」:Charging ends when the capacity set in ■NiMH Capacity Limitation is charged in charging mode.

-As reference-
Explanation of -ΔV (cut) in a video (watch from about 6' 20")

■Activation charge
「Off」:Charging starts normally in charging mode.
「On」:Charging starts after discharging in charging mode.

■NiMH voltage
If the Nickel Metal Hydride (NiMH) battery exceeds the set voltage during charging, charging ends. Originally, it is used as a safety function when the battery voltage becomes abnormally high. The standard setting value is 1.55V, but setting a value lower than that may end charging before the battery is fully charged.

■NiMH capacity
When the capacity limitation function is set to "On", charging ends when the specified capacity is charged.
The standard setting is suitable for AAA NiMH batteries.
* When charging AA NiMH batteries, be sure to increase the set value according to the capacity of the batteries. If you don't increase the set value, it may not fully charge.
Example: When the AA battery capacity is 2000mAh, set it to 2400mAh (set about 1.2 times the capacity)

As a special use, you can set the setting value to 50% of the battery capacity to finish charging when the charging capacity reaches about 50%. If you charge the battery to 100% just before the race starts, you may start with a high battery voltage.

[Configuración de tareas]

If you select "Auto", the type of task selection is limited.

Select "NiMH" when using an AAA NiMH battery.


[Tareas disponibles cuando elige "NiMH"]

■Description of the function by task



・Current(Load current)
Set it to the same current value as the battery capacity or less.
Example: When the capacity is 800 mAh: 800 mA ⇒ 0.8 A

・Cut (-ΔV)
During charging, the voltage rises to the maximum and then falls. The voltage difference between the maximum voltage and the voltage after the dip is expressed as -ΔV. Normally, it is set to -Δ5mV. In this case, charging ends when the voltage drops -5mV from the maximum voltage. Decreasing this value ends charging before full charge and prolongs battery life. On the contrary, if this value is increased, the battery is overcharged and the discharge power is increased, but the battery may be damaged or the battery life may be shortened.

When you use this charger for the first time, please use it with the normal setting -ΔV=5mV.
-As reference-
Explanation of -ΔV (cut) in a video (watch from about 6' 20")



・Current(Discharge current)
In the case of using a NiMH battery, it can be set to 1.0 A maximum, but since the built-in resistance is fixed, 1.0 A does not flow when the battery voltage drops.

■・Download time
Normally, select "Unlimited". In that case, the discharge ends when the battery voltage drops to the set "Cutoff".

As a special use, for example, by setting the discharge time to 3 minutes, you can discharge assuming the MINI-Z Cup rating, and measure the average discharge voltage for 3 minutes. (It is necessary to set the discharge current correctly. For reference, the details are explained in the ●Analysis section.)

・La Court
discharge ends at the set voltage. For NiMH batteries, it is usually set to 0.9V.

●Cycle C->D
●Cycle D->C

C:Upload / D:Download

C->D: upload then download.

D->C: Download and then Upload.

It can be repeated automatically by setting the number of cycles.


・Cut: Same as ●Download task setting

・Charging current: Same as ●Charging task setting

・Download current:same as ●Download task setting



It can be set from 1 to 30 times. The operation is repeated for the set number of cycles.
* If the NiMH capacity limit is applied, the task stops in the middle. Please note the setting value.
* Cutoff (-ΔV) during charging is the last value set in the charging task.


See ●Analysis for a description of the screen in action.



This task is almost the same as the loop task, but it only works once with D->C->D.

The performance of the battery is judged by the data of the second D (discharge).

①Current battery voltage ②Voltage
average battery (during charge/discharge)
③Current current (charge/discharge)
④Charging capacity (latest charging data)
⑤Download capacity (latest download data)
⑥Elapsed time/number of cycles
⑦Temperature of the drums
⑧Battery internal resistance (includes contact resistance)

"Average Discharge Voltage": Displayed in ② when discharging.
It is the average value of the voltage maintained during the discharge time. The higher this value, the better the MINI-Z's acceleration and the higher its top speed.

"Discharge Capacity":⑤
The capacity of electricity that can be drawn from the battery.
The higher this value, the longer the operating time.

-As reference-
How to choose a good battery for race time (3 minutes)?

(1) Measure the discharge capacity of your AAA NiMH battery through an ● analysis task.
For example:
Configuration: Charge current 0.8A / Discharge current 1.0A / Cut-off voltage 0.9V /
Unlimited measurement of download time
Check battery capacity.
The discharge capacity at that time was 800mAh = 0.8Ah (for example result)

(2) Measure run time by racing around the race track with your very own MINI-Z.
For example, result: the execution time was 50 minutes.
⇒ The average value of the current consumed by MINI-Z is calculated as 60 minutes / 50 minutes x 0.8A = 0.96A.
⇒1.0 A can be assumed to be a suitable discharge current value for a simulation.

(3) Select a battery with a high average voltage according to the rating (3 minutes)
For example:
Configuration: Charge current can be set as desired / Discharge current 1.0A / Cutoff 0.9V / Discharge time 3 minutes.
Measure all the batteries you have and put them in descending order of average discharge voltage, and you can assume that the highest voltage 4 battery combination is adequate to qualify for 3 minutes.


Charging NiMH batteries that have not been used for a long time may end a few minutes after startup. This is a task to repeatedly charge and discharge such a battery to bring it closer to a normal state.
* A completely discharged battery or an old battery may not be recovered.

See Cycle Task for each configuration.

It works D->C->D->C->D->C.
For AAA NiMH batteries, setting the charge current to 0.5A or less powers up the batteries faster. When the download capacity is close to the normal state, finish the task even in the middle of repeating.


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