Overview

The i-Torch video pro 3 light is a versatile tool that can be used as a dive light, focus light and video light. It has one push button on the back, when pressed for two seconds it switches on to a nice white light (LED) producing 650 lumens with an 80-degree beam angle.

The next four pushes scroll through 4 different power settings -- half, one third and a quarter of the power. The fifth push turns it into a pure red light producing 300 lumens and a 25-degree beam angle. Push it again for two seconds and it will switch off.

The specs of the light are impressive:

•    Weighs in at 290g (10.6oz)
• Takes 4 AA batteries,
•    Will burn for 80 minutes at full power and up to 10 hours at low power.
•    The maximum setting produces 650 lumens and minimum about 160 lumens.
•    The beam angle varies from 80 degrees to 25 degrees on low setting.
•    The depth rating is 100m/333ft.
•    Built from aluminum, has double o-rings for a secure seal and a ball mount can be easily attached to a bracket that fits over the light.
•    The white light is produced by a MC-E high output LED
•    15 bright red LED’s produce the pure red light.

Issues

The flashlight had the following issues:

battery holder was stuck in flashlight due to battery leakage
push button on battery holder had come disconnected
leaf contacts on spring connector were damaged

Teardown

Opening the Upper Section

Battery Holder:

Repair

Battery Leakage

When a battery is left without power for too long, or it is left empty for too long in a device, a gas forms in the battery. If the pressure of the gas becomes too great, the protective layer of the battery breaks (a deliberate choice made by the manufacturer to avoid an explosion inside the battery).
Alkaline batteries can leak aqueous potassium hydroxide, which is a basic solution. The best way to clean battery corrosion in this instance is with an acidic liquid. Pour a half teaspoon of either white vinegar or lemon juice into a bowl.

So, this required some hard cleaning first with vinegar followed by isopropyl alcohol.

I was getting a constant voltage between VCC and 3 when I should have gotten 0 volts. Seems that the battery acid/gunk must have been slightly conductive. A hard scrub to get ride of all the gunk seemed to do the trick.