Question about Sanyo MM-7400

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Sanyo 7400 keeps draining battery with calls .B attery only 5 months old

Hi . Battery is draining only after 2-3 hours use. Phone tells you it needs to be recharged after making one phone call . one tells me its the battery, the other tells me its the phone. What do you think? Thanks Brian.

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Re: sanyo 7400 keeps draining battery with calls .B...

Try a new battery. They're on ebay for cheap.

Posted on May 02, 2008

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How do I stop the battery from draining after only a few hours.

try letting the battery completely die and recharge it. Do this 2 or 3 times. Sometimes "topping up" a partially charged battery puts a memory into the battery and it wont allow you to do full charge.. I let my Nokia get to its last legs before replacing the battery with a spare and then fully charge the other one. Both batteries are now at least 6 years old.. Yes , its an old phone...

Apr 08, 2015 | Tracfone Wireless LG 440G

1 Answer

I had the phone for one month and now yhe battery is going flat after 6hours low use. Even if the phone is fully charged and turned off,turn the phone back on again after 6 hours the battery is flat.


Since the battery drains even when you have it off there is a hardware issue. I was going to tell you that it was either the battery or the phone. Since you say that the battery dies when the phone is not a factor, I would have to say that your battery needs replacing. I have the galaxy S captivate and my battery is great, I had the Vibrant also and it too had good battery life.

Good luck!!
EJ Kudelka

Dec 29, 2010 | Samsung Galaxy S GTI9000 Smartphone

1 Answer

Cellphone was dropped accidentaly in a tub full of water

Yikes, try the old standby- remove the battery, sim card, memory card, and get out a hair dryer. Set it on low and carefully blow warm air into every nook and cranny of the phone for about 5 mins. Then blowit on everything else as well- attery, sim. memory card. Placed everything on a towel for 48 hours or so, pray a lot, and 2 days later put everything back together. Change up the battery to the max, before you turn it on for the first time, and pray one more time. If you're lucky everything should have dried out nicely, and the phone will work. Do not under any circumstances try to turn on the phone unless it is thoroughly dried out, because water and electricity just don't mix.

Jul 22, 2009 | Sony Ericsson K850i Mobile Phone

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Sanyo katano wont charge or turn on.

may be it the battery is low charge or the swetch is broken

Jun 14, 2009 | Sanyo Katana SCP-6600 Cellular Phone

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Invalid Battery

Totally discharging the battery is the way to go. But what you can also do to use your phone in the meantime is this. Plug your charger into the phone withOUT your battery in. It will tell you "Unable to Charge." When it says this, put the battery in. It might tell you "Invalid Battery" a couple more times, but it did eventually say "Charging Battery" for me. After that, simply turn the phone on and it will return to normal. This is when you drain the battery completely. Once I did that, I did not get the invalid battery error again.

May 14, 2008 | Motorola Mobility RAZR V3

2 Answers

Suspect Battery is Dead But Not Completely Certain

In my 30+ years of servicing battery operated devices, I have to tell you that 95% of the time, it's a bad battery.

Question1 : I agree that it should operate on outlet power. Perhaps the battery has a shorted cell and is eating up all of the charger's available current. Chargers have a limited amount of capacity.

Question2: Charge the battery then remove it from the phone. It should be slightly warm to the touch if you touch it within a few minutes of completion. If you have access to a DC Voltmeter, let the battery sit for a couple hours and check the voltage. It should be at least (usually higher) what is written on it. Other than that, replacing it is the only other way.

Hope that helps...


Apr 04, 2008 | Sanyo RL-4930 Cellular Phone

1 Answer

Sanyo 7400

The charging circuit has failed; time for a new phone.

I love my BBW MM-7400, had mine for years…

Great phone; never a problem with her.

Mar 26, 2008 | Sanyo MM-7400

1 Answer

Cell is shuting off after about 3 mins of talking on it!

its a hardware issue so u need to take to repair store since you have the insurence

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2 Answers

Unlocking a Sanyo 7400

try this type the code ##726400# on the home screen it will come up with some options


click edit and type ur number in
with the second thing (173.......) do not put 027 in it went ur done that it will tke u back 2 the main menu and click done and it will resstart ur phone u will still have every thing but ur code will be the last 4numbers of ur phne number and that will sovle ur problem hope it helps

Oct 18, 2007 | Sanyo MM-7400

1 Answer

New Motorola Red Razor via Sprint

i can help you with your problem ??? please message me and i can assist you from here

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