jedi battery life

Post by **bradlington** » Wed Jan 04, 2006 4:42 am

MT series /gp900 /gp1200-jedi series

How do I fix this problem where the battery does not last on the radio -battery warning after about 3 hrs and 4 hrs the radio is dead.

Is there a setting in the service software to change this.

A number of batteries have been bought all with the same thing .Tried both nicad and nickel metal with their appropriate chargers.

REgards

Brad

nmfire10 · Post by **nmfire10** » Wed Jan 04, 2006 7:30 am

I don't think there is a setting to make the battery die. It's more likely that a physical hardware problem with the radio is sucking the battery down.

RadioSouth · Post by **RadioSouth** » Wed Jan 04, 2006 11:38 am

Yup, like he said. Unless there's a problem with the radio the only other thing that comes to mind is your duty cycle. Battery longevity spec. is based on 5% TX 5% RX and 90% Standby, so if you're doing a 'real' lot of transmitting and/or full volume receive it's certainlly possible to pull the battery down in 3-4 hrs. What brand batteries and are you 'initializing' them for 1st use ? Usually take about 4 charge/discharge cycles to get the full potential out of a new battery.

Post by **wavetar** » Wed Jan 04, 2006 11:48 am

Yes, if it were a matter of getting the "low battery" beep after 3 hours and then having the battery last 8, you might look at adjusting the low battery threshold (which is not even an option for most RSS). The fact it's actually dying an hour later tells us either:

1 - The batteries are crap, or

2 - Your duty cycle exceeds 5-5-90 by a fair margin.

Todd

Post by **bradlington** » Thu Jan 05, 2006 2:01 am

Good Day All

Thanks for all the comments .

This radio is used by a policeman , which standard practice in our country-repeater traffic does not allow much time for stand-by or battery save mode.Also the volumes are kept at "max" and the transmit cycle is high.

I have read that the 6.03 software has changed the voltage setting from 6.0V to 5.9 in the cenelec models.

I will suggest that he places an additional charger in his vehicle.

Thanks for all the comments .

Regards

Bradley Glen ZS5WT http://members.harc.org.za/zs5wt/

RKG · Post by **RKG** » Thu Jan 05, 2006 8:07 am

Putting a charger in the vehicle will complicate both vehicle operation and battery management. A simpler solution: get a second battery. Use Batt #1 until it beeps. Do a Code 10 to the station and swap batteries while getting coffee.

SPEAKER MIC · Post by **SPEAKER MIC** » Thu Feb 09, 2006 9:22 pm

code 10 is nice, but if he does a 2 and has it and his coffe brought to him its much much more convient...

bellersley · Post by **bellersley** » Fri Feb 10, 2006 2:17 am

What brand of batteries are you using? I had a similar problem when I bought an aftermarket battery (Axtech-a local shop sells them for $65 instead of the Motorola brand for $95). It would take about an hour to fully charge (nothing unusual) but after only 5 or 6 hours of use, it would chirp and another couple of hours it would die. A real Motorola NTN7143 used under the same conditions lasts a full day, if not more.

bellersley · Post by **bellersley** » Fri Feb 10, 2006 2:17 am

What brand of batteries are you using? I had a similar problem when I bought an aftermarket battery (Axtech-a local shop sells them for $65 instead of the Motorola brand for $95). It would take about an hour to fully charge (nothing unusual) but after only 5 or 6 hours of use, it would chirp and another couple of hours it would die. A real Motorola NTN7143 used under the same conditions lasts a full day, if not more.