Shouldn't Wi-fi model have much better battery life than 3G/4G models?

hcho3 · Mar 17, 2012, 09:41 AM

I am not an engineer, but I was just wondering...

Shouldn't Wi-fi model have much better battery life than LTE ones?

Because LTE is a battery killer, but I only have Wi-fi models. Shouldn't Wi-fi ones have much much battery life than LTE?

LTE now gets 9 hours and Wi-fi gets 10 hours.

Is this accurate?

r.j.s · Mar 17, 2012, 09:42 AM

Better LTE radios use less power than previous LTE radios.

jeffg819 · Mar 17, 2012, 09:43 AM

I was wondering the same thing. I'm not an engineer but it sounds probable to me.

184550 · Mar 17, 2012, 09:44 AM

Sure, if one was to only use 3G/4G/LTE their battery life would not be as good.

However, if cellular data was turned off, as mine is, their battery life would be just as good.

KoukiFC3S · Mar 17, 2012, 09:49 AM

The screen is the biggest power sucker, so that's why the numbers are so close.

Craiger · Mar 17, 2012, 10:05 AM

Quote:

Originally Posted by KoukiFC3S

The screen is the biggest power sucker, so that's why the numbers are so close.

This is what I was going to say. Some place claimed it used twice as many led's for the backlight.

Summez · Mar 17, 2012, 10:09 AM

I think it's because the main drain on the battery now is the retina display and a5x chip, but when I first saw the keynote I was surprised that the bigger battery meant there was not a small increase in battery life for the wifi model I expected the 4g to have the same as the 3G iPad 2.

Stealthipad · Mar 17, 2012, 10:13 AM

Only time a LTE might use more power is while on LTE. I have LTE but have yet to have the need to use LTE. The day will come, it has before and I will be glad I got it.

Mar 17, 2012, 09:41 AM	#1
hcho3 macrumors 68030 Join Date: May 2010	Shouldn't Wi-fi model have much better battery life than 3G/4G models? I am not an engineer, but I was just wondering... Shouldn't Wi-fi model have much better battery life than LTE ones? Because LTE is a battery killer, but I only have Wi-fi models. Shouldn't Wi-fi ones have much much battery life than LTE? LTE now gets 9 hours and Wi-fi gets 10 hours. Is this accurate?
	0

Mar 17, 2012, 09:42 AM	#2
r.j.s Demi-God (Moderator emeritus) Join Date: Mar 2007 Location: Fort Knox	Better LTE radios use less power than previous LTE radios. __________________ After the Army: no one can stay forever
	0

Mar 17, 2012, 09:49 AM	#5
KoukiFC3S macrumors 6502a Join Date: Jul 2010	The screen is the biggest power sucker, so that's why the numbers are so close. __________________ VZN iPhone 5 + iPad 4 LTE
	0

Mar 17, 2012, 10:09 AM	#7
Summez macrumors member Join Date: Mar 2011	I think it's because the main drain on the battery now is the retina display and a5x chip, but when I first saw the keynote I was surprised that the bigger battery meant there was not a small increase in battery life for the wifi model I expected the 4g to have the same as the 3G iPad 2. __________________ 27" iMac, 17" iMac G4, 13" Macbook Pro, iPad 3 32GB wifi, iPhone 3GS, iPhone 4S, iPod Touch, iPod Nano (1st Gen, 5th Gen, 6th Gen), iPod Shuffle,iPod Classic 160GB
	0

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Mar 17, 2012, 09:43 AM	#3
jeffg819 macrumors regular Join Date: Dec 2006	I was wondering the same thing. I'm not an engineer but it sounds probable to me.
	0

Mar 17, 2012, 09:44 AM	#4
184550 Guest Join Date: May 2008	Sure, if one was to only use 3G/4G/LTE their battery life would not be as good. However, if cellular data was turned off, as mine is, their battery life would be just as good.
	0

Mar 17, 2012, 10:13 AM	#8
Stealthipad Banned Join Date: Apr 2010	Only time a LTE might use more power is while on LTE. I have LTE but have yet to have the need to use LTE. The day will come, it has before and I will be glad I got it.
	0

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