Read more.Quote:
It can be used to extend your Razer Blade Stealth battery life beyond 15 hours, says Razer.
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Read more.Quote:
It can be used to extend your Razer Blade Stealth battery life beyond 15 hours, says Razer.
I like the way this looks but can't help think it seems awfully bulky for just 12,800mAh capacity. I've got one of the 20,100mAh Anker powerbanks and it looks much more convenient than this. Maybe I'm missing something
Voltages. Anker bricks are mostly 5v, laptops aren't.Quote:
Originally Posted by bitbucket
Fair enough! ThanksQuote:
Originally Posted by BiscuitVoltages. Anker bricks are mostly 5v, laptops aren't.Quote:
Originally Posted by bitbucket
Does having an AIO solution for different devices justify the poor capacity and high price? I got the 20,100 mAh Anker nearly 2 years ago for around £20.Quote:
Originally Posted by BiscuitVoltages. Anker bricks are mostly 5v, laptops aren't.Quote:
Originally Posted by bitbucket
@bitbucket+Biscuit: It's not that big and given they state 46Wh with a 12,800 mAh rating, it can be calculated to be about 3.6V. With the leeway they probably put into that, it is about your everyday lithium voltage. I'm guessing its got a fairly typical arrangement of four ~3200mAh 18650 cells in it. So capacity wise, there is plenty of competition in the region from existing mobile chargers.
I like that it seems to be following USB PD specs for output and input but my god, its expensive for what it is. And not enough green LEDs.
you can buy a brand new petrol generator for less than that:
https://www.machinemart.co.uk/p/clar...enerator-g720/
It'll store more energy too, about 11MJ from a full tank vs 0.17MJ for this battery pack. Bigger battery packs are also available for much less, IIRC I paid £20 for a 20Ah one off amazon a couple of years back
if you make pc's stay away from adding cell phone crud.... it just makes us mad
Windows 10 please take note
Anker? That kind for your phone? That outputs 5V to pump juice into your 3.7V phone battery.Quote:
Originally Posted by bitbucket
This Razer is 12,800 mAh outputting juice at 20V or more. The latest laptops powered by USB-C typically are rated at 20V input. Non USB-C laptops tend to be anything from 16V (Panasonic) to 22 or even 24V.
That means that all else being the same, Razer power bank has probably 4 times the power in Watts as a 12,800 mAh powerbank for phones. P=VI.
But there is a lot of literature about how manufacturers of powerbanks fudge the capacity issue where the mAh spec does not clearly refer to 3.7V or 5V.
Laptops can take higher voltage, but as AETAaAS pointed out razer state the capacity as 46WHr - this demonstrates that they're assuming a voltage of 3.6v. It's absurd for the price, you could get a combined capacity of 174AHr from poundland powerbanks for the same cost (no need to bring them all with you all the time, just grab a few full ones when you leave the house)
Gee, can you charge that by plugging into a wall? Why must I run to the petrol station to top up a charger? Why must I smell of grease and petrol each time I do that? You mean I have to get carbon monoxide/lead poisoning if I use it indoors to charge my devices?Quote:
Originally Posted by Xlucine
Quote:
Originally Posted by AETAaAS
@Xlucine / @AETAaAS / @bitbucket+Biscuit
For heaven's sakes, read the specs and understand electricity!
It has a capacity of 46Wh. which means it can output 46 Watts for an hour.
It can output at:
USB Type-C | 5V 3A / 9V 3A / 12V 3A / 15V 3A / 20V 2.25A
USB Type-A | 5V 2A / 9V 2A / 12V 1.5A
To charge a laptop via USB-C, this Razer battery pack will have to output at 20V, 2.25A.
Which Anker battery can output 20V for heaven's sakes? Your typical power bank for your mobile phone can only output at 5V which is the same as your phone's wall plug charger.
P = VI
With a 46Wh capacity, it can output a 20V current at 2.25A for an hour. For your phone, it can output a 5V 1A current continuously for more than 9 hours.
Its not just any 12,800 mAh powerbank! The intelligent circuitry to ouput the correct voltage so as not to fry your device and then to regulate the current is what makes it expensive.
See the specs here:
https://www.razerzone.com/gaming-accessories/razer-power-bank
You have obviously never used an LPG powered generator, or one of the Honda 'suitcase' style generators.Quote:
Originally Posted by preter_s
If I don't understand, please point out what is objectively wrong with the original post.Quote:
Originally Posted by preter_s
I was pointing out that the Razer power bank does not have any extraordinary size or capacity, because of the energy it can store; 46Wh and the mAh rating (12,800), means it has a nominal voltage of 3.6V. This has nothing to do with the output calculations you have done, since you can have fancy circuits to make it output whichever voltage you want.
What it does point out is that its capacity is in the same ballpark as other mobile power banks which are massively prevalent. To put it simply, as far as capacity goes which is the point of my post, it is as you put it "just any 12,800 mAh powerbank".
NB: I have highlighted a word since you seemed to have missed it first time around. Capacity
Here's an anker battery that supports quick charge 3.0, so should support 20V power supply:Quote:
Originally Posted by preter_s
https://www.amazon.co.uk/Anker-Power...dp/B01D0WDWL8/
Only £30 too.
The circuitry is a non-issue. Here's a suitable step-down converter:
https://www.amazon.co.uk/eBoot-LM259...dp/B01GJ0SC2C/
(If I were designing this, I figure 6 cells in series would be better - currents are lower, so efficiency ought to be better) The USB spec is not very complicated, even though the website feels like going back 10 years, and a fakeino ATmega would suffice - SMBUS is I2C based, after all.
The fumes are part of the ambience, and I'd be impressed if you found leaded petrol that would still work in a 2-smoke - carbs and non-volatile petrol don't agreeQuote:
Originally Posted by preter_s