ISDT FD-200 Discharger

The iSDT FD-200 discharger offers up to 200W discharge power and is therefore also suitable for discharging larger battery packs in a reasonable amount of time. It can discharge 2-8S LiXx batteries, the discharge current is easily adjustable on the device from 5 - 25 amps. The discharge voltage is fixed at 3.8V, so safe operation is easy. Everything can be monitored and set on the smartphone via the Bluetooth function using the iSDT app. With dimensions of 142x 100x 63mm and 790 grams, the FD-200 is absolutely handy. The fan control is regulated, but can be clearly audible under high load.

Info: A connection cable between battery and discharger is NOT included. You need a cable with an XT60 plug, which you then connect to your battery!

Technical data:

• Size: 140×60×100mm
• Weight: 790g
• Maximum discharge power: 200W
• Input voltage: 7-35V
• Discharge current: 5/10/15/20/25A
• Number of cells: 2-8S
• Complete automatic shutdown
• Alarm for excessive battery voltage
• Transfer efficiency: 93.2% at 220V and 65A
• Error message when setting the cell number
• System support: Android 5.0/IOS 10.3
• Bluetooth support
• Plug input: XT60

Why discharge batteries?

1. Improve cell balancing

Moderate discharging can help to equalize the voltage of the individual cells. Particularly with batteries where the cells drift apart slightly, this makes it easier for the charger to balance the cells when charging.

2. Making capacity fully usable

Discharging to a defined, low voltage level (typically approx. 3.5-3.7V per cell) ensures that the battery can use its full capacity as much as possible the next time it is charged. This is particularly interesting if you want maximum voltage ("top voltage") and energy yield in the next heat.

3. Optimize voltage peaks in the next heat

In certain classes (especially in stock classes or controlled motors), targeted discharging can result in the battery appearing somewhat "fresher" or "more aggressive" the next time it is charged, because it delivers higher voltage peaks when fully charged (e.g. more punch when accelerating).

4. Temperature management

Controlled discharging also lowers the battery temperature for the subsequent charge - important if the battery is still warm directly after a run. LiPos do not like to be stored hot or charged hot.

Important: Risks & limits

• Never discharge below 3.0V/cell! Discharging below this level damages the chemistry and can permanently damage the cells.

• No "forced discharging" necessary after every run - only selectively if the setup or racing strategy requires it.

• Keep discharge currents moderate - 1-5A is usual, depending on battery capacity.

• LiPo storage mode ≠ race preparation - storage voltage (~3.8V/cell) is for storage, not directly for racing.

In short:

Targeted discharging before charging can help prepare the battery for maximum performance in the next race session (better balance, higher peak power). However, it should be used in a controlled and deliberate manner, otherwise there is a risk of more harm than good.