| Electronics > Beginners |
| I may have found a legit need for a .."batteriser" |
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| wraper:
--- Quote from: KL27x on January 09, 2019, 10:59:52 pm --- --- Quote ---G700 was a top end laser gaming mouse. Battery life sacrificed for maximum performance. On the other hand, your mouse sacrifices performance for maximum battery life. --- End quote --- I smell excuses. I am thinking it's more like the G700 is a top end gaming device. Hence, it might take too much time and effort to optimize such a short run, niche product for low sleep current. Designing and coding for low sleep current is device specific. It is one of those things a consumer takes for granted, but it is a total PITA and requires some work with the datasheet. You can't just code it in C with your favorite compiler. There's a big nest of decisions that has to be made, correctly, starting from the start. --- End quote --- It's not about sleep current but about low lag and accurate tracking. Sensor and wireless transfer eats a ton of power. This mouse eats a lot when moved but can last very long when just stays idle. Running from only single AA battery also contributes to low run time. Also it's not like it's a low volume product. BTW Logitech did not have any issue simultaneously selling mouses which run for 6 months at lower price. |
| helius:
--- Quote from: Red Squirrel on January 08, 2019, 07:06:51 pm ---Some devices (like wii remotes) are very picky about input voltage. ...So right off the bat, the remote thinks the battery is at a lower capacity due to less voltage. --- End quote --- For the few devices that do this, you still aren't forced to use alkalines. Nickel-Zinc cells have similar energy capacity to NiMH, are rechargeable for similar number of cycles (500-800), and have a nominal voltage of 1.5 V. You don't need a Batteriser. |
| epigramx:
--- Quote from: wraper on January 07, 2019, 11:03:22 pm --- if you look at battery discharge curves, at 1.13V there is only a little bit of energy left. --- End quote --- but then there's this claim |
| Buriedcode:
I'm calling bullshit on that claim. For a start it implies, well, blatantly shows that alkaline batteries - I'm assuming its a standard AA here - have ~900mAH capacity. The few I have tested (lidl, Aldi, Sainsburys) have been roughly 2400mAH. The blue line is believable, and I would guess fairly realistic given its capacity of 1900mAH. What it doesn't show however is the current draw. I'm not sure exactly what chemistry those enloop are but I'm assuming its NiMH that have a nominal voltage of ~1.2V. For it to remain flat for what looks like ~1.3V+, along with the capacity approaching max, I'm guessing thats a current draw of <100mA. The graph misrepresents alkaline batteries either by using a different current draw (would have to be>1A) that makes the comparison incorrect. Or.. they've used a discharge curve from a zinc-carbon cell which generally have 800mAH capacity and are rarely used. Duracell use this trick in their TV ads "when compared to AA zinc carbon cells". So they compared two completely different chemistries, that have wildly different capacities and discharge curves, and claim that their alkaline cells are superior. |
| tooki:
--- Quote from: KL27x on January 09, 2019, 10:59:52 pm --- --- Quote ---G700 was a top end laser gaming mouse. Battery life sacrificed for maximum performance. On the other hand, your mouse sacrifices performance for maximum battery life. --- End quote --- I smell excuses. I am thinking it's more like the G700 is a top end gaming device. Hence, it might take too much time and effort to optimize such a short run, niche product for low sleep current. Designing and coding for low sleep current is device specific. It is one of those things a consumer takes for granted, but it is a total PITA and requires some work with the datasheet. You can't just code it in C with your favorite compiler. There's a big nest of decisions that has to be made, correctly, starting from the start. Even if the one mouse draws 10x the current while in use, that wouldn't necessarily be noticeable over the life of the batteries. If there's a huge difference you can bet it's the sleep current. --- End quote --- It's not "excuses", wraper is absolutely right: it's deliberate design decisions. In normal wireless optical mice, the sensor goes into sleep mode after a period of mouse inactivity (somewhere in the ballpark of 10 secs, IIRC from my last wired mouse), waking up briefly every 1/4 second or so to check for motion, and waking up if there is. (You can see this because the LED starts a slow blink.) The downside is that if you haven't moved the mouse in a bit, then there's a delay before the mouse pointer actually starts moving. In normal desktop use, this is absolutely no problem and essentially unnoticeable. Additionally, the wireless receivers use low-power modes. In gaming mice, where a 1/4 sec lag could cost you a shot, wireless mice totally forgo sleep, and stay fully awake the whole time so that they react instantly. On top of this, they use faster sensors, which use more power to begin with. Finally, they use different wireless that uses higher polling rates and no sleep. And that's why wireless gaming mice have miserable battery life compared to their regular counterparts. I have the non-gaming equivalent of the G700, the Performance MX. I do notice the tiny little lag when waking it from slumber. (I can't observe it directly, since the Performance MX and G700 do not use an LED light source, but infrared lasers.) |
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