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The Teric's Battery Performance.

Discussion in 'Computers, Gauges, Watches and Analyzers' started by Jay, Jun 1, 2019.

  1. Jay

    Jay Need to dive more!

    # of Dives: 100 - 199
    Location: Melbourne, OZ.
    Some of the other SB members and I have been delving into how our Teric’s batteries perform, what affects them and to what degree.

    The TLDR version is that diving with the Teric in default setup, using AI, will give you 6 days of diving, 4 dives/day, 45mins each, before hitting Critical (Red) before it needs a charge (and it's probably prudent and best for the Teric battery's longevity to charge it on day 5).

    Our delving is still on-going and completing accurate testing takes time and a bit of patience, but if anyone does want to join in please PM me.

    Initial Expected Performance
    30 hours in Dive Mode with AI enabled using default settings(*1)
    50 hours in Watch Mode using default settings(*2)

    (*1) Default settings are; Medium screen brightness, White font, Log (Sample) Rate of 10 seconds.
    (*2) Watch Mode in (full) Digital Display + (*1).

    Other Performance Info
    After launch there were some error checking procedures necessary (in all modes) which reduced the above numbers by approx 10%.

    Therefore, 30 hours or 3.3%/hr becomes 27hrs or 3.70%/hr (Dive Mode), and 50 hours or 2%/hr becomes 45hrs or 2.2%/hr(Watch Mode).

    It is possible (likely I guess) that future FW updates might be more battery intensive as new features are introduced.

    When the Compass is displayed on the outer-ring, or in the Info Screen, it will affect battery consumption between 25-50%. 25% is for High screen brightness (low refresh rate), 50% is for Low screen brightness (high refresh rate).

    AI consumes approx 10% of the battery. Finding Comms in the first 90 seconds (at full power) consumes over 25%(/hr) of battery. After 90 seconds, it uses >50% approx ~15%(/hr). [Edit - adding;] Finding Comms / No-communication; flashes yellow for the 30-90 seconds, then flashes red after 90 seconds.

    Watch Mode Testing (measured over several days):
    The purpose of Watch Mode testing was to ‘calibrate’ our Terics to each other’s, and as an easier way to verify they’re up to spec.

    Screen colour choices play a role:

    (All on, Default Settings) %/hr
    Red 1.7%
    Cyan 2.0%
    White 2.3%

    Cyan (Max Brightness) 2.2%

    Cyan (Max, Orbit - medium detailed view) 2.6%

    The Analog watch face hasn’t yet been tested.

    Dive Mode Testing (measured over several days of diving):

    Cyan, Medium Brightness, Big screen display, 10sec Sample Rate. 3.1%/hr

    I assume the screen brightness relative differences will be the same as per Watch Mode above, but this has not been tested.

    The Log (Sample) Rate has not been tested. If it does has an effect, it’s expected to be less than the AI effect.

    Moving from Big Screen to Standard screen has not been tested. I assume there's not much of an effect.

    Using the above data, taking an 'extreme' case; if you always have the compass continuously displayed, low screen brightness (high refresh), using AI, do 4 * 45min dives/day, and use it as a watch for 8 hours/day (medium brightness), you'll consume just under almost exactly 1/3 of a full battery, meaning you're probably charging it every second day or sacrificing some watch time at the end of day 3. If you don't use it as a watch, but keep the compass displayed at all times, then you'll just squeeze in 4 days of diving. Again, probably charging it on day #3 for prudence and battery longevity

    When doing calcs, some allowance needs to be made going from Dive Mode to Dive Time (boat etc wait time, surface wait etc. I've been using ~15% of Dive Time as my approximate adjustment.

    General battery info (mostly from FAQ: Teric - Shearwater Research or SW).
    Entering Watch Mode or turning the screen off when in Dive Mode (with AI activated), stops AI. (There’s no need to turn AI on/off to save power unless you’re in Dive Mode).
    The typical battery life is 5 years.
    It costs CAD$100 + shipping to replace it. 5 Biz day expected turnaround exc shipping time.
    Extreme temperatures, such as being in a hot car, in freezing conditions, or repeatedly fully discharging the battery will adversely affect it’s life. The latter point is countered by built-in protections, but not letting the battery get into Critical for too long and/or recharging it when Low (yellow) seems prudent for longevity.
    The battery’s performance is guaranteed to Specs for 2 years.
    The battery% only displays even numbers. I assume this is to stop it jumping around too much. Occasionally after a battery %drop, you might see it pop back up again for a 3-5 minutes before dropping again.
    The battery on a unit can perform differently at different times. Whilst the work and numbers above might seem accurate, they were done across multiple days of testing and we did find the occasional mild anomaly intra-day.
    [Edit - to add:] The battery will last 3 months in Standby (20/ Teric Specs p.86) (its sleep mode - there is no off switch), therefore it 'decays' 1.1%/day naturally. Therefore, SW recommend to fully charge the Teric when stored, and that would imply to top up the battery prior to the end of the third month so it doesn't go into Critical, then 'Dead'. p82 says to top up the battery every 6months. Perhaps the 3 months is precautionary, and it might be 3-6months depending on how old the battery is.
    [Edit - to add:] re Quick Charging. From another post SW answered about battery longevity: "It is ok to always quick charge whenever you have a capable power source." Even with Quick Charge off, a few hours to charge is quick in my book.

    When my Teric’s battery is up for replacement, at that time newer and higher capacity batteries will be available and CAD$100 will be a cheap way to re-boost its performance.

    I was curious what other rechargeable watch style dive computers with AI and colour screens claim their battery performance is:
    •Suunto D5 6-12 hours of diving, or 6 days in time mode. (Memory in Pixel (MIP))
    •Ratio iDive Color ~20 hours of diving, 1-2 months of watch mode. (LCD with IPS)
    and that’s it?
    •(non AI) Garmin Descent MK1. Dive Mode "up to” 40 hours, 12 days in smart watch mode. (Transreflective Memory in Pixel (MIP)).

    That other battery data seems to demonstrate how power hungry the Teric’s AMOLED screen is.

    I’m a bit surprised at the D5’s dive battery performance; I didn't think they would let it be ~half of their competitors (best case).

    When looking up the D5’s battery info I came across this …. …”Warranty is not enforceable if the product or accessory …4/ has been exposed to chemicals including but not limited to sunscreen and mosquito repellants.” What on earth is that all about!? The lawyers gone bonkers? -… it seems it’s on their other computers' manuals too. Someone must have applied too much to one of their devices.

    Our Teric battery delving is still on-going and completing accurate testing takes time and a bit of patience, but if anyone does want to join in please PM me.

    Happy Diving!
  2. Diving Dubai

    Diving Dubai Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: Dubai UAE
    I have no experience of the D5, on the Eon. Using you're figures I would be surprised too.

    It may be their being conservative with the number, because there are so many variables and teh don't want a slew of complaint from people whose battery performance doesn't meet the quoted max? Of course havign a low quoted number may affect the purchase decision by some.

    I seem to remember the Eon [steel] boasted a max time of 40hrs when it came out - after a very brief scan of the suunto manual and site did not' show that number anymore.

    My experience from 5 years/700 dives on my unit is that the battery seems to indicate 1hr less diver time per year. Its hard to tell because of the variables of use, and then different firmware versions altered the way they estimated battery usage. But if the degradation of my batteries remain the same, it's likely that I'd be replacing the computer before the battery failed. In my head when I purchased it, I had an battery life expectation of 5 years so anything more is a bonus for me.

    It'll be interesting to see what more you find, and how Teric bears up from extending use by it users
    Compressor and Jay like this.
  3. Compressor

    Compressor ScubaBoard Supporter Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NYS
    Thanks for the reports. I find them very useful.
    FWIW, I am not getting the Teric just because of the battery. I prefer to have a user replaceable battery like the Perdix. I think a lot of divers think like myself too.
  4. BurhanMuntasser

    BurhanMuntasser Dive Charter

    # of Dives: I'm a Fish!
    Location: Nomad
    What is the problem of charging it every night before you go to sleep? I do that with my mobile and other electronic gadgets and never have the desire for regular batteries.
    tridacna likes this.
  5. MargaritaMike

    MargaritaMike Divemaster ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: On a non-divable lake in SE Texas
    I'm running out of places to put a charger. This is especially true when I'm on vacation and in a room that has ONE plug for the television and ONE plug for the bedside lamp. I have to plug in my phone, dive light chargers (2), my computer, and maybe a camera. Next question?

    Cheers -
  6. BurhanMuntasser

    BurhanMuntasser Dive Charter

    # of Dives: I'm a Fish!
    Location: Nomad
    Use a USB hub, no problem. I travel with cameras, strobes and dive lights with rechargeable batteries (lots of them) and they have to be charged on daily basis. I have no issues with space or charging. A charger for the dive computer is simply a USB cable with appropriate plug, it can't get simpler or smaller than this.
    tridacna, Hoyden and LiteWeight like this.
  7. lexvil

    lexvil ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    When I travel I wear the Teric, I bring one power source with a QI charger I can do the phone and the teric, after the teric comes the camera using the same mini usb wire followed by any other batteries, I don’t make things more difficult than necessary, I only bring one battery, for the transmitter.
  8. Compressor

    Compressor ScubaBoard Supporter Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NYS
    Nothing wrong with it.
    But as all batteries go, the battery will degrade with time and eventually may need to go back to manufacturer.
    Maybe I'm not thinking correctly and perhaps the computer needs to go to Shearwater for servicing after x # of years anyway but the convenience of changing the battery myself is a positive attribute.
  9. BurhanMuntasser

    BurhanMuntasser Dive Charter

    # of Dives: I'm a Fish!
    Location: Nomad
    Battery lifetime is around 5 - 8 years depending on the mfg. I don't think that it is a bad thing. For me rechargeable battery is generally a very good thing. Where I live and travel there is always the issue with counterfeit batteries that don't last 10% of what they should and even having access to the batteries is sometimes a chore in itself. We can't order batteries from Europe or the US and have them shipped via courier since most, if not all, couriers don't allow batteries in their planes.
    Compressor likes this.
  10. Griffo

    Griffo DIR Practitioner

    # of Dives: 200 - 499
    Location: Sydney, Australia
    I pack a small power board. Also means that when I traval to foreign countries that I only need a single adaptor for all my chargers.
    stuartv and BurhanMuntasser like this.

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