Replacing the battery

Batteries might be bad, after a few years and many charges batteries will no longer hold a charge.

I've written up a complete step-by-step tutorial on how to replace the battery on a Remington MB-300 Beard trimmer: John Fixes Stuff How to Replace the Batteries in Remington MB 300 Beard...

There is no safe way to bypass the batteries. If the shaver is intermittent, you have a bad connection somewhere. Bad batteries do not work sometimes and not other times.

Replacement batteries can be found at shaveroutlet.com. You need two. See link below

http://shaveroutlet.com/shaver-replacement-parts/batteries/other-brands/replacement-battery-for-remington-df-ms2-some-braun-p-213.html

Video tutorial at link below

http://www.youtube.com/watch?v=cxfWUXyHfUM

Batteries in your shaver model were not designed for replacement. Disassembling the shaver will result in damage to the case as it is glued together.
shaveroutlet.com has a simple and inexpensive solution of replacing the 'lower unit'. See link below

http://shaveroutlet.com/shaver-replacement-parts/remington-ms32700-lower-unit-p-210.html

The batteries are dead. They will need to be replaced or replace the shaver. You will find the correct battery type at shaveroutlet.com using the link below

http://shaveroutlet.com/replacement-battery-for-remington-df-ms2-some-braun-p-213.html

You may want to consider buying the replacement part linked below instead as it will not require the effort of replacing the batteries

http://shaveroutlet.com/remington-ms2370-lower-unit-p-208.html

Remington model R-9500

Your shaver will not hold a charge because the shavers internal batteries need replacing. If you know how to solder, you can do it yourself or you can have it professionally done. You can purchase batteries or professional repair service from shaveroutlet.com. See links below.

http://shaveroutlet.com/shaver-battery-pack-for-most-shavers-p-211.html

http://shaveroutlet.com/professional-battery-replacement-for-most-models-p-374.html

If you feel this is something you want to try yourself, you will need to remove the back cover of the shaver. You will easily notice two screws on the back. There is a third screw that is near the very top on the back and it is underneath the trimmer where the trimmer connects to the shaver. Remove these 3 screws to take off the back cover.
Inside you will see the batteries. You will need to remove the metal clip that helps secure them into place. You will then need to use a soldering iron to remove the wires from the ends of the old batteries. Solder the new batteries to the wires and put everything back together in reverse order
Once the job has been completed, charge the new batteries for 24 hours.

167labrie does your zen power up while it is plugged into the ac adapter? If this is the case it is a bad battery. I had this problem where the unit wouldn't take or hold a charge from the ac adapter or the usb cable and they ended up replacing the unit.

Hi
The manual will give you info on the battery that is inside the trimmer.If you can get to the battery then buy same TYPE or similar to the original---VOLTAGE/CURRENT RATING/CHARGING etc and size, connection
Hope this helps
Jay

I had this happen, and I solved it by connecting it to the car charger for a while, then bringing it in and connecting it DIRECTLY to the AC charger for a full charge. (This assumes the battery is not just kaput.)

Here's what I think happens: The AC charger doesn't have enough current capability to run the unit by itself AND keepp the battery charged (bad design), so, if left continuously ON, the battery will eventually drain. In this state, if you shut it off, the unit senses a low-battery condition and will try to charge, but the charging circuit tries to draw too much from the AC charger and the voltage droops (causing the whine) to the cutoff point (causing it to stop charging, another case of bad design). The car charger has more current capability, so it gets the battery charged enough to use the AC charger again.

When you initially used the unit was it with the battery or not? If it was with the battery was the AC hooked up also? You need to remove the batteries from the equation to find the problem. Hook the camcorder directly to the AC unit and see what it does. Also you do not mention how you know that the AC unit has power at the lead. Checking with a DMM does not garantee it. I have seen units which have the correct voltage until you put a load on the AC adapter. At this point the AC adapter could be bad, the battery could have a memory or be bad or the input jack could have a bad solder joint. If you have a DMM and know how to use it check the AC adapter for proper output. If it checks OK you will have to assume that it does not have the problem I mentioned. I have only seen that one time. With no battery on the camcorder, plug the AC adapter in and try the unit. If it does not work you probably have a broken input jack. If you are good with tools, have jewelers screwdrivers, magnifying glasses, a steady hand and lots of patience remove the covers to expose the jack and repair the connection. This should solve your problem. If you are not capable of the repair you will need to find a good reputable repair facility to take care of this. Cost should be less than $100 US. Good luck.