Difficulty

Moderate

Steps

9

Time Required

                          30 - 45 minutes

Sections

1

  • Ni-MH battery
  • 9 steps

Flags

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  • BackBraun Oral-B Triumph 9900

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Introduction

There are couple YouTube video which can help you visualize also

History: I have bought that toothbrush in 08/25/2009. I have replaced the battery in 07/07/2012. I am replacing again on 08/30/2014.

What you need

Step 1

              Ni-MH battery
  • Remove plastic ring by prying it off with large screwdriver. Be careful not to damage rubber handle top or the ring.

Remove plastic ring by prying it off with large screwdriver. Be careful not to damage rubber handle top or the ring.

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Step 2

  • To remove the base of your handle place triangle shaped knob on your charger into hole at the bottom to unscrew and remove a small plastic screw. Turn clockwise
  • You might use a flat screw driver to help separate the bottom

To remove the base of your handle place triangle shaped knob on your charger into hole at the bottom to unscrew and remove a small plastic screw. Turn clockwise

You might use a flat screw driver to help separate the bottom

Step 3

  • Do not pull the coil ring as the wire will break away from the the circuit board
  • With flat screw driver, slide down along the case. Gently push both plastic tab toward the center
  • To help you removing the inner part, you can insert another screw driver here and pull gently toward you while you try to free the plastic tab

Do not pull the coil ring as the wire will break away from the the circuit board

With flat screw driver, slide down along the case. Gently push both plastic tab toward the center

To help you removing the inner part, you can insert another screw driver here and pull gently toward you while you try to free the plastic tab

Step 4

  • Be careful not to break those wire as they are very fragile
  • Use a T6 screwdriver to remove the screw
  • You can also grease the gears

Be careful not to break those wire as they are very fragile

Use a T6 screwdriver to remove the screw

You can also grease the gears

Step 5

  • Pull the plastic clip and lift the LCD screen a little bit on both side so you can free the LCD screen from the bottom
  • After you have remove both plastic clip away from the circuit, slide the LCD screen up. You will fee the LCD screen from the top

Pull the plastic clip and lift the LCD screen a little bit on both side so you can free the LCD screen from the bottom

After you have remove both plastic clip away from the circuit, slide the LCD screen up. You will fee the LCD screen from the top

Step 6

  • This is the positive tab
  • This is the negative tab

This is the positive tab

This is the negative tab

Step 7

  • Remove the spring

Remove the spring

Step 8

  • Remove the battery tab from the circuit board

Remove the battery tab from the circuit board

Step 9

  • Make sure you respect the polarity when you are placing the new battery (see step 6)
  • You might need to trim the battery tab
  • Solder the battery tab on the circuit board

Make sure you respect the polarity when you are placing the new battery (see step 6)

You might need to trim the battery tab

Solder the battery tab on the circuit board

To reassemble your device, follow these instructions in reverse order.

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                                                                                      17 other people completed this guide.

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                    Shinn Chyang Chen

Member since: 09/14/2011

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Lacey Clifton - Nov 20, 2015

Reply

Tip: The 8mm Hex Bit (from the macro bit kit) can replace that silly triangular plastic tool molded into the power adapter.

While trying to do this “repair” to replace my battery, the bottom screw was in so tight that I stripped out the plastic tool.

alfredchwong - Jun 30, 2016

Reply

I have just replaced the new battery on Triumph Professional Care 9000, followed all of the instructions. I charged the battery to full 100% but when I switch it on, the motor doesn’t turn, it’s just dead silence. The LCD displays correctly with different brushing modes but the motor and brush is not turning. I’m wondering what steps I may have missed and if you can provide some guidance on how to fix this problems. Look forward to any helpful hints and suggestions. Thanks in advance.

Shinn Chyang Chen - Jul 5, 2016

You can try to measure the current with a multimeter on the motor when it is turned on.

bester - Apr 27, 2022

I have the same issue. It worked fine a few times and then quit. The display works fine, too.

I accidentally started it while taking it apart. When I was loosening the base, it started to work again. There’s something applying enough pressure to the mechanism to stop it whenever it is pushed into the handle.

With the base re-installed, the toothbrush stops again. It works whenever I push the assembly down. I’m suspecting that the blue ring at the top may have something to do with it.

Okay, I found it.

After removing the mechanism, I turned it on and noticed that it only worked if I pushed the motor towards the battery. Once I removed the spring I noticed that one of the two metal strips connecting the motor to the board was split right where there is a slight bend. I applied a little bit of solder to repair the connection and it is working again.