| Joined: | Sun Apr 1st, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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The 18650 battery is usually rated at around 3.6 Volts X 3 = 10.8 Volts.
My measurements suggest that three 18650 cells will fit inside an EN-EL4 casing. That MIGHT be an option, to re-cell the EN-EL4 battery with high capacity 18650 cells... Maybe a good solution, subject to the cells fitting of course. They would still be able to be charged from a standard charger then.
I have checked the output of my EN-EL4 batteries and they show about 12.3 Volts (off load) No doubt the circuit will be regulated but I wouldn't want to push the boundaries. I have read that it's quite OK to feed directly from a car battery (13.8 Volts) into a Nikon camera. I have even heard of people using up to 18Volts but I think that might have long term issues. Some sort of voltage and current control between the battery and the camera might be desirable, I expect there will be some circuitry in the battery which performs this function.
Hence my quest for a dead battery. I am loath to open up my only genuine EN-EL4 battery, OK it's life is at 4 and it's not perfect but it did perform even in the cold of Kielder for a while, maybe 60 exposures against about 120 exposures apiece from the Germany sourced units.
Nes does have a new EN-EL4a battery but I can't get a price out of him so it's probably going to be high... But even that isn't going to answer my needs for long intervalometer sessions of say 12hrs or more, which are my long term aim.
Added info:
This is a possible candidate for upgrading the EN-EL4 unit. But I would prefer something with solder tags.
https://www.batterystation.co.uk/rechargeable-batteries/xtar-18650-3400mah-3-7v-li-ion-protected-led-torch-battery-1-pack
Also (Solder Tagged):
https://www.batteriesplus.co.uk/acatalog/LG-DB-18650-HG2-Tagged-Brown-Li-Ion-INR-18650-Rechargeable-Battery---3.7-V-3000-mAh-Lithium-cell-2050.html?gclid=Cj0KCQiA1afSBRD2ARIsAEvBsNlLIWKgp40Du1L94Dyv5VqT4RuVZ5FbQDbaqm46LykEDLSnUx5e4FkaAvsyEALw_wcB
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Robert.