Firmware update is failing and get stuck in 50%

[Anshumaan]

from last 1 month I am trying to update my Charge device to new firmware FOTA update given by Fitbit and tried 10s of times. every time the update gets stuck in 50% and then my app says not able to find Fitbit device. 

in that time, my charge become inactive and shows only update progress bar as 50% no other button / function works. it takes its own time to come alive again some times in 10 mins or longer.

is there any other way I can update my Fitbit charge..??

Moderator Edit: Updated Subject For Clarity.

[RobertoME]

Hello @Anshumaan, welcome aboard to our Fitbit Community! If your app is telling you there is a pending firmware update and is not going through try the following steps:

1. Turn your tracker off and on again using the instructions in this post. (Note that the restart shows the steps fro the Charge HR, but rest assure the steps will apply for your tracker too)
2. Try the firmware update again. If it doesn't work, reboot your mobile device and try the update again.
3. Try the firmware update again. If it doesn't work, on a different mobile device or computer (if available) log into your Fitbit account and try updating your firmware.

If you are going to try this with your computer, you need to install the Fitbit Connect software and connect your dongle.

1. If your device came with a wireless sync dongle, make sure it's plugged into a USB port on your computer. 
2. Verify that you're using the latest version of Fitbit Connect:
   1. Click the Fitbit Connect iconlocated near the date and time on your computer. If you can't find the icon, you may need to reinstall Fitbit Connect from http://www.fitbit.com/setup.
   2. Click Open Main Menu...
   3. Click Troubleshooting.
   4. Below the Fitbit Connect number, click Check for updates.
3. Go back to the main menu and click Check for device update.
4. When prompted, log in to your Fitbit account. Fitbit Connect syncs your watch or tracker and then looks for an update. If an update is found, Fitbit Connect displays a progress bar until the update finishes. If your device has a screen, you'll also see a progress bar there.
5. Keep your device close to the computer during the update. When the update is done you'll see a confirmation message and your device will restart. Note that updates may take up to an hour to complete.

Hope this helps. See you later.

[gma45]

And I t still won't completely update,  I have tried off and on for past year and half to get firmware update to complete 

Charger 2, Fitbit