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voltage

Hi all

As reguards to the megger 1553 i was reading through the instructions and it says not to use rechargeable batteries ? is there a reason for this im just curious.
What do you guys use in your meggers or testing equipment that requires batteries.
Think i'll buy a pack of 16 duracell and keep them in my kit so as not to run out and not make myself look a plonker while testing.

What do you guys do reguarding spare batteries etc.
 
the reason they say not to use rechargeables is because the high short circuit current could damage the tester. i buy duracells cheap £3.99 for 8, and carry a spare set.
 
Great thanks for fast reply telectrix. Good to know about the rechargeables didnt know that info.
Yeah the spare set idea seems to be the best bet thank you once again.
 
Hi all

As reguards to the megger 1553 i was reading through the instructions and it says not to use rechargeable batteries ? is there a reason for this im just curious.
What do you guys use in your meggers or testing equipment that requires batteries.
Think i'll buy a pack of 16 duracell and keep them in my kit so as not to run out and not make myself look a plonker while testing.

What do you guys do reguarding spare batteries etc.

Hello voltage

telectrix is correct, a possible short circuit would enable the rechargeable batteries to generate substantial heat that would damage the battery compartment and tester

Regards

Megger TSG
 
Use the best batteries that you can get, believe me, it makes a big difference, it actually works out cheaper to use quality batteries than cheaper lower quality ones, insulation resistance and continuity testing both seem to hammer the batteries in the 1553.
 
Use the best batteries that you can get, believe me, it makes a big difference, it actually works out cheaper to use quality batteries than cheaper lower quality ones, insulation resistance and continuity testing both seem to hammer the batteries in the 1553.

Yes i will buy duracell dont want to scrimp on batteries thank you very much for the heads up.
 
I've had it on VERY good advice from a mate who does mostly testing that duracell are not up to much. He recommends Tesco own brand for 5 x + life. Worth thinking about and doing some comparisons of your own. Don't just glibly accept the duracell advertising claims.
 
I've had it on VERY good advice from a mate who does mostly testing that duracell are not up to much. He recommends Tesco own brand for 5 x + life. Worth thinking about and doing some comparisons of your own. Don't just glibly accept the duracell advertising claims.

Interesting i will certainly give them ago many thanks.
 
and then we come to li-ion......... up to 10 x duracell life.
 
Hi all

As reguards to the megger 1553 i was reading through the instructions and it says not to use rechargeable batteries ? is there a reason for this im just curious.
What do you guys use in your meggers or testing equipment that requires batteries.
Think i'll buy a pack of 16 duracell and keep them in my kit so as not to run out and not make myself look a plonker while testing.

What do you guys do reguarding spare batteries etc.


All batteries present same dangers due to short circuit. How would a set of Ni-Mh batteries short circuit more so than Alkalines in the 1553?

The reason alkalines are preferred is probably due to the reduced voltage of rechargeable cells more than anything else. i.e 8 x 1.2V against 8 x 1.5 . I'll bet the voltage level drops more rapidly in the rechargeables too, which could prevent the device from powering up.

Strangely, the new 1730 uses 6 rechargeable 1.2V Ni-Mh batteries.

We have just bought one of these testers, and will be investigating the use of 3 rechargeable 14500 cells instead, should the device accept the high post-charge voltage.
 
Last edited by a moderator:
All batteries present same dangers due to short circuit. How would a set of Ni-Mh batteries short circuit more so than Alkalines in the 1553?

The reason alkalines are preferred is probably due to the reduced voltage of rechargeable cells more than anything else. i.e 8 x 1.2V against 8 x 1.5 . I'll bet the voltage level drops more rapidly in the rechargeables too, which could prevent the device from powering up.

Strangely, the new 1730 uses 6 rechargeable 1.2V Ni-Mh batteries.

We have just bought one of these testers, and will be investigating the use of 3 rechargeable 14500 cells instead, should the device accept the high post-charge voltage.

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
 
the use of which may void the warranty.

I love the way companies do this, say one thing but mean another....

I can tell you as sure as night follows day, that any excuse to not honour a warranty claim (hefty repair bill), will be taken and used. So I'm afraid 'may' will not come into it. :rolleyes:
 
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!
 

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