megger 1553

[MeshMan]

Hello

Ni-Mh batteries have a lot higher short circuit current than alkaline batteries. The heat generated can cause extreme damage to the MFT1500 Series.
Also the lower voltage can cause issues when the batteries start to deplete.

The MFT1700 Series, unlike the 1500, was designed to utilise rechargeable 1.2V Ni-Mh batteries.

The 14500 range of batteries have a voltage of 3.6V so in theory 3 batteries replace 6 alkaline batteries.
Due to the fact the overall voltage would be 10.8V instead of the expected 9V it should be noted that the MFT1700 was not designed to operate at the higher voltage. Also the buillt in charger is not designed to charge the 14500 batteries, the use of which may void the warranty.

Regards

Megger TSG

Thanks for the info Megger_TSG...

I've just re-read my post, which should have read that we bought the 1553 device. I think it wise that we monitor battery consumption first before we dabble with Li-Ion cells! Would 3 of the 3.8V Li-Ions (10.8V) be within tolerance of the MFT1553 (8 x 1.5V)? I understand that the initial post-charge of the Li-Ion cells is 4.2V which immediately drops to 3.8V upon use. The voltages do seem compatible, but don't know if I'm prepared to bet a brand new 1553 on it!