I was looking at the terminals of the BA2240 battery pack and was wondering what the T and D stood for on the electrical terminals, between the + and - .
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100 Points
Posted 5 years ago
Jennifer VandeWater, Community Manager
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81,048 Points
Official Response
Hi James, thanks for your question. These terminals are part of the EGO Power+
diagnostic system and are used to communicate information between the battery
and charger.
We have attached a picture for reference in case anyone is interested.
diagnostic system and are used to communicate information between the battery
and charger.
We have attached a picture for reference in case anyone is interested.

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2,676 Points
to expand on this, generally speaking, T would be for temp, D would be for data. If you want to do some digging on the data side of things TI makes a very popular battery capacity monitoring chip.
http://www.ti.com/lsds/ti/power-management/battery-fuel-gauge-products.page
http://www.ti.com/lsds/ti/power-management/battery-fuel-gauge-products.page
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120 Points
Does the battery pack on the mower have to have the T connector because I noticed there are 3 metal connectors sticking out but 4 on the battery. T, D, +, & - and my battery is fully charged but not getting power to the mower for some reason. It just stopped working and the T connection looks like it is missing on the mower. I am not receiving headlights, power indicator lights nothing is working on the mower.
Blue Angel, Champion
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179,968 Points
There are only three contacts in the newer tools.
- 60 Points
I hooked up a 52v battery to my blower using the + and - terminals and it runs for about 10 seconds before it cuts out. It seems like the battery communicates to the tool. Is there a way to allow an external battery to run the tool without it cutting out? I'm trying to build my own backpack battery pack.
- 70 Points
Is it possible to use the Ego chargers to charge 52v batteries other than Ego? I have several Ego chargers and my other 52v batteries need a charge. I tried to connect just the + and - to the other batteries and then plugged the charger in. The charger LEDs lit up for a moment and then the charger seemed to go deeply asleep. The charger still works fine on the Ego batteries. Thanks.
- 70 Points
Top charge is 58.8v. Bottom out near 46-48v. Same cell set up.
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Jennifer VandeWater, Community Manager
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charger if battery is heeting up. It is connected to the minus terminal.