UPS that is UN-interrupt-able;!..

Discussion in 'Computer Information' started by tony sayer, Jan 27, 2011.

  1. tony sayer

    Espen Koht Guest

    It's a set of niches. The sort of work I do, you get new versions of
    documents arriving all the time. And responses can't wait till you get
    home, because the conference is over by then. Maybe that's my niche.[/QUOTE]

    That was sort of my point. I was never going to suggest the iPad would
    satisfy your need Roland, just that other people's work habits may now
    be converging to one where tables may satisfy their requirements are
    yours becoming more specialised rather than the norm.
     
    Espen Koht, Jan 31, 2011
    #81
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  2. tony sayer

    Roland Perry Guest

    You were questioning why I'd buy a "phone", rather than a "tablet" (by
    implication a tablet that also allowed me to do phone calls - and other
    applications). The answer being that the applications I require don't
    all run well enough on a tablet, and the only tablet big enough at all
    to do some of the applications is an iPad which doesn't have phone
    capability - so I'd be carrying three things rather than two.
    My requirements are the same as the classic "desktop PC" user, just that
    I am able to carry it around with me, pick up my email from anywhere
    etc. When I go into offices I don't see fewer desktop PCs these days
    (even if more people are using smartphones as PDAs).
     
    Roland Perry, Jan 31, 2011
    #82
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  3. tony sayer

    Alex Selby Guest

    Though curiously they happen to have a good deal on for AAs and AAAs at
    the moment
    (£14.99 for 100 alkalines).
     
    Alex Selby, Feb 2, 2011
    #83
  4. tony sayer

    Roland Perry Guest

    If that's the blue own-brand, I've bought the odd box and they are OK.
    Not sure the SLA are especially overpriced, if you just want one.
     
    Roland Perry, Feb 2, 2011
    #84
  5. tony sayer

    Espen Koht Guest

    How do they compare to branded batteries like a duracell
    copper-top/procell?
     
    Espen Koht, Feb 2, 2011
    #85
  6. tony sayer

    Duncan Wood Guest

    Well I generally budget on 20p per cell for procell. Their 1000mAh seem
    to have less usable energy at 10 cycles than 800mAh Eneloops at over 100
    cycles, but that's an observation, I've not tested it yet.
     
    Duncan Wood, Feb 3, 2011
    #86
  7. tony sayer

    Alex Selby Guest

    I think the rule of thumb is that alkalines are generally reasonably
    similarish in normal use conditions mostly usually (is that enough
    caveats?).

    According to this random guy on the internet using his discharge test
    http://stuarthalliday.com/reviews/alkaline-batteries-reviewed-part-7/
    the Maplin extralonglife alkalines (the ones currently on offer) come
    somewhere in the middle. The Maplin AAAs are 3% worse than Duracell
    Ultra and Procell, but 9% better than Duracell Plus.
     
    Alex Selby, Feb 3, 2011
    #87
  8. Interesting, but unfortunately a very different discharging scenario
    from the one that interests us the most (much slower; order of 12 months
    or so).
     
    Espen H. Koht, Feb 3, 2011
    #88
  9. very best self discharge is lithium polymer..but even so I am not sure
    the life goes much beyond 3 years typically.

    Charge is also pretty easy. Just limit voltage to 4.2 v per cell and
    current to about the same as the hourly capacity, and they are happy.
     
    The Natural Philosopher, Feb 3, 2011
    #89
  10. tony sayer

    Roland Perry Guest

    I haven't done a rigorous comparison, but they seem to last well enough.
    Better than "value" brands from the supermarket, I'd say.
     
    Roland Perry, Feb 3, 2011
    #90
  11. tony sayer

    Roland Perry Guest

    Morrisons value Long Life (Zinc) 44 minutes <- Argh!
     
    Roland Perry, Feb 3, 2011
    #91
  12. tony sayer

    Espen Koht Guest

    Does the relative cost reflect that by the time these reach the shelf?
    I'm looking a zinc AAA batteries here being about 6p vs 25p for the
    alkaline wholesale(-ish) which is a ratio reasonably consistent with the
    performance. Does that carry through to retail?
     
    Espen Koht, Feb 3, 2011
    #92
  13. tony sayer

    Roland Perry Guest

    The Maplin ones are half price at 15p each (per 100) inc VAT, so sound
    like a good deal in any case. I'll have a look at Morrisons next time
    I'm there. (But I did get four light bulbs for 28p last time, which
    seemed too good to be true).
     
    Roland Perry, Feb 3, 2011
    #93
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