Memory Options & Media Continuation

In terms of storage, the K750i comes with approximately 35mb of useable memory on the device. In addition to this, it can take both memory stick duo and memory stick duo pro memory sticks, which is a welcomed relief. At present you can get duo pro memory sticks up to the capacity of 1 GB (which the phone's processor can support).

128kbs is a recommended compression rate in terms of maintaining near CD like quality but not making each file too big. Using this setting, it roughly compresses 1 min of music to 1mb meaning that on average with a music single of around 4 mins, you can get about 250 tracks on a 1 GB card. Not comparable to a mini iPod where you can store around 1000 tunes, but considering this is much more than just a music player (it is also a 2.0 mega pixels camera and oh yes, mobile phone!), I think 250 tunes is more than enough for the average and even above average music lover. I'm certainly impressed with the potential storage of this device.

Apart from storing audio and video (MP3, MP4 and 3GP and wave formats), the K750i can also video stream from compatible websites. The web links do however have to be 3GPP compatible.

Battery life is also more than sufficient if using the Media player often. This I'll cover more comprehensively in a minute.

The FM Radio function is identical to the equivalent in most other SE phones. The hands free kit/stereo earphones serve as the antenna and hence must be plugged in to operate this function. The radio can save up to 20 stations and again when maximum volume is used can reach a fairly high sound output level. The radio can also be played through the phone's loud speaker but the hands free kit must still remain plugged in. 

Battery Life

Battery life on most products is usually miss-quoted. The K750i is quoted of having battery life of up to 400hrs stand-by time and 9 hours talk time. Even in maximum performance conditions i.e. full signal strength and suitable temperature I don't think any phone would achieve these kind of performances. Even if they did, these figures are calculated assuming that when in stand-by mode, not a single function is activated and the same for talk time. This is something that would defeat the purpose of the device and all its multiple functions and hence makes the calculated figures when tested as indicated above totally irrelevant. When people talk about battery life, what they want to know is how long will it last taking into consideration day to day use, including the usage of functions, making calls, stand –by time when not in use etc.

So to give you a more accurate and realistic reflection of the battery life I'll explain what I found throughout my usage.

After my initial overnight charge which I gave the K750i when it was brand new, I waited a few full charging recycles to ensure I allowed the battery to build up to its maximum performance. Even at this early stage, I noticed I could get away with not charging my phone for long periods, and I'd consider myself to be quite a heavy user of the phone functions, not just making calls.

My general day to day usage is as follows:

 In the morning I use the alarm to wake me up. This is set to an MP3 track and to the maximum volume to ensure I don't sleep through it. I always set my alarm about 30 mins before I actually need to get up, as I tend to hit the snooze button a few times which is set to 5 minute intervals. After getting ready for work, I set out on my approximate 1 hour total journey. During the whole of this, I am listening to either the radio or MP3 player, which I'll explain in more detail.

As described in the MP3 section, I don't like background noise when listening to music so I always have my volume (and graphic equalizer) to at least 70% of its maximum capacity so that my music is loud enough to overcome any surrounding noises. My first method of travel is on a bus which is approximately a 20 min journey to the underground tube station. During this period, I usually listen to the radio and simultaneously access the mobile internet to check the new news stories and sports headlines and updates. Once I get to the underground station, I then disconnect from the mobile internet and switch to the MP3 player as I can no longer get signal reception. I also increase the volume level from 70% to around 90% in order to combat the now nosier surroundings of the underground tube. This remains like this for the next 40 minutes of my journey.

When I get to work, I switch off the MP3 player and dial on to a conference call from my K750i which usually lasts around half an hour. In order for me to do other things at the same time as listening to the conference call, I usually put the phone on loud speaker and up to its maximum volume.

Throughout the day, I receive numerous calls on my phone (around 20 calls in total) although they are usually short duration calls (between 2 – 5 mins each). My phone's ringtone volume is set to the loudest level and I am usually always busy when my phone rings so I don't answer it till around 7 or 8 rings. I make in total around half the amount of incoming calls I receive, so around 10 per day each with a 2-5 mins duration, although sometimes when on hold to various departments at work these can range up to 10 mins each. I also send and receive about 15 sms messages during the day.

My phone also automatically checks for emails every hour, so during the course of the day around 9 times will this happen. The phone takes around 35 seconds to check for new messages.  On maybe 3-4 occasions there are new messages and it downloads these which takes slightly longer and therefore drains slightly more battery power.

After work, I set home using the same journey described earlier. Again, I use the music functions on an extremely loud volume level all the way home. This makes a total of around 2 hours of music usage. Add on another average of around 90 minutes for voice calls (in and out) during the day, another 15 minutes for the total time the phone polls for new messages and during sending/receiving sms, a further 30 minutes for my half an hour conference call on loud speaker in the morning as well as 15 more minutes for continuous ringing on the loudest level through the loud speaker I calculate an approximate ‘real life' usage of around 4.5 hours.


When I get home, I use this phone for a few more mins whilst deleting messages, voicemails etc. I then put it on my table but not on charge, and leave it in the stand by mode. The rest of my evening usage is then done on my other phone which is for personal usage, so my K750i (apart from the odd text here and there) is usually on stand-by up until bedtime. At this point, I take it with me and put it beside my bed (still not on charge) for the alarm to wake me up the following morning.

With this typical day to day usage, I can usually get through 3 full nights & days without charging the device. This is approximately a total of 13.5 hours usage time (including talk time, menu navigation and functions etc), and 72 hours stand-by time. Sometimes I purposely wait for the phone's power to run out by itself just so I can get an accurate reflection of the ‘real life' battery time. The results are always consistently accurate. As this phone is used more during the week, a total of 2 complete charges (totalling to about 4 hours) is more than enough for me per every 7 days.

In my opinion, this battery life is excellent and is up to the demands of my daily routine. With similar described usage on other phones, I usually find I'm charging my phone every second night and in some cases every night, so for me the K750i's battery is certainly a massive plus.


1 Comment

1. shadoweaver unregistered

I've been using my k750i for a year now and still have no plans of changing or upgrading. It fits my mobile needs and I am very happy with it. The design is minimalistic but attractive and very elegant -- a very balanced device.
  • Display 176 x 220 pixels
  • Camera 2 MP
  • Storage 0.032 GB
  • Battery 900 mAh(9.00h talk time)

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