MJLorton Solar Power and Electronic Measurement Equipment Forum

Youtube Video Episodes => YouTube Video Episodes => Topic started by: SeanB on October 06, 2014, 11:53:08 AM

Title: T4D #111
Post by: SeanB on October 06, 2014, 11:53:08 AM

https://www.youtube.com/watch?v=RgbMWOVCY5Y

T4D #111 - Mailbag, battery testing and a fair bit more......

Title: Re: T4D #111
Post by: birrbert on October 06, 2014, 12:41:30 PM

Hi! Allow me to post my YouTube comment here too.
 

Quote

Awesome job again, Martin! I really envy you. :-) Please take this as a compliment.

The oscilloscope would make a nice giveaway... or any equipment for that matter which otherwise would only stay on the shelf.

And a suggestion: please mention in your battery testing spreadsheet an approximate price, plus which ones are rechargeable and which ones aren't. I believe that these are important factors. For instance, a battery might have a good watt hour per kg, but due to it's high price another one could be a better choice for an everyday consumer; or the Energizer Ultimate Lithium for example would not always be a good choice since it's not rechargeable (i.e. I have really good experience with Eneloops).

Thanks!

Title: Re: T4D #111
Post by: SeanB on October 06, 2014, 04:18:55 PM

Yes, the Tadiran is a primary cell, and gets it's high capacity from having a very porous graphite anode, which has a high capacity, but as well a high internal impedance. Thus the low current rating, but it does have a long life and very low leakage. Thus it is intended for low current use.

I have a Crompton Eternacell here, that expired probably 5 years ago, but which still has some capacity remaining. Made in the UK by Hawker Siddeley, and probably will still have some life in it after another 5 years. I stopped using it as it's internal resistance was too high, and even with a 2200uf capacitor in parallel with it it would not supply a 10mA pulsed load.

Title: Re: T4D #111
Post by: TechJunkie on October 09, 2014, 12:16:13 PM

The Tadiran cell sounds perfect for what I need for a low voltage data logger which I use for long term data acquisition. I have seen them on Amazon and other sellers sites but never tried one. Good info!

Title: Re: T4D #111
Post by: BaMheeMooDang on October 14, 2014, 05:20:59 AM

I've been looking forward to and keeping an eye on this one for quite a while.

Title: Re: T4D #111
Post by: MJLorton on October 19, 2014, 01:14:23 PM

Quote from: birrbert on October 06, 2014, 12:41:30 PM

Hi! Allow me to post my YouTube comment here too.
 

Quote

Awesome job again, Martin! I really envy you. :-) Please take this as a compliment.

The oscilloscope would make a nice giveaway... or any equipment for that matter which otherwise would only stay on the shelf.

And a suggestion: please mention in your battery testing spreadsheet an approximate price, plus which ones are rechargeable and which ones aren't. I believe that these are important factors. For instance, a battery might have a good watt hour per kg, but due to it's high price another one could be a better choice for an everyday consumer; or the Energizer Ultimate Lithium for example would not always be a good choice since it's not rechargeable (i.e. I have really good experience with Eneloops).

Thanks!

Thanks for posting here as well good man...I can't reply to your Youtube posts...perhaps something related to Google +.

Very good points about the information in the spreadsheet. When time allows I will try incorporate that as well.

Hope you have a happy birthday on the 25th.

Cheers,
Martin.

Title: Re: T4D #111
Post by: birrbert on October 21, 2014, 03:37:28 AM

Thanks! Will do so. :)

Title: Re: T4D #111
Post by: 3roomlab on November 02, 2014, 01:16:32 PM

o.o ... seanb = mr martin?

Title: Re: T4D #111
Post by: SeanB on November 02, 2014, 02:06:35 PM

No, he lives in Cleveland Ohio, I live in Durban South Africa. About equidistant across the globe.

Funny enough we are both roughly the same distance from you in Singapore though.......

Title: Re: T4D #111
Post by: MJLorton on November 03, 2014, 02:21:46 PM

Trust you to have those facts Mr B!  ;)