sundance-communications.com/forum Forums TDM Business Telephone Systems NEC Telephones & Systems Anyone using MH240 WiFi handsets??

Anyone using these thing?? We have a couple of sites here who are complaining about the crap battery life. NEC documents says that the standby battery life is 40 hours where in reality they are getting about 5 hours. One customer is threatening to pull out the system. We are proposing replacing the MH240 with IP DECT.
Anyone else have any of these things installed and how has your mileage been..??

Look at standby and talk. See if you are supposed to get 40 hours, I don't think you do.

According to the specs. Battery Life. Talk time: Up to 3 hours. Standby time : Up to 80 hours.. I reality we're seeing about 1 hour talk time and 5 hour standby..

https://www.necam.com/specs/MH240/MH240_Specs.asp

I would call NEC if it's still under warranty and get it resolved. I would also make sure when you get the new batteries to follow the initial charging AND discharging procedure to a T.

What Coral Tech said about the charging and discharging.

I tell customers not to place the handset in the charger after each call, I try to put the charging cradle some what out of easy reach to keep them from doing so.

Thanx for your replies folks.

Unfortunately this is a problem with all the MH240 handsets we have sold over the past couple of years including ones in use here in the demo systems wich last about 8 ~ 10 hours on standby.. The service techs here have basically tried all these ideas with no improvement. I see that there is a MH250 out in the US. We are trying to get our hands on one to make a comparison..
We have also asked NEC in Australia for their feed back with these handsets..

What type of system are you using them with? You could switch over to a Polycom handset and gateway. I have had really good luck with them. But they are not compatible with the SV8300. Not sure about the SV8100s either.

We did try the Polycom handsets but found them very unreliable and support in this part of the world nil. There is a local reseller but they gave no tech support so we had to get it from Polycom in the US. We have only sold one system lot of those we change out 100% of the fones due a design fault..

I agree it's probably all down to charge and discharge. Your demo kit has probably also seen far from perfect discipline when it comes to charging all the way to 100% then using until 10%. Its the same with my hugely engineered iPhone. If I put it in the charger for 23 hours a day and took it out for 10 minute intervals inbetween, it would be shot soon too.

And I'm sure my iphone battery has had a lot more R&D than the MH240....

Unfortunately I doubt you can change this sort of human intervention.

We treat 'dect devices as consumables for this very reason. To maintain and warranty batteries is always at a loss. Making it come out of their pocket gives them an incentive to come down hard on the way staff use their devices.

If it were me, I would scrutinise the batteries, see if something harder will 'fit' both physically and compatibility and propose a better replacement than NEC's own. More than likely from NEC it's 'off the shelf' anyway, when it comes to batteries.

We gave up on the MH240. There is some time this year a new wireless handset coming out that uses NEC iSIP and will use an MLT licenses and be configured like a MLT. This should be easier to configure and hopefully more reliable..