U can attach powerbank to it.. That is what i do when taking time lapse.. For cycling just duct tape it to the frame..

hi, i had this dilemma, so heres my opinion, i bought the GP4 Silver, it is superb !, the only downside for it is the battery life, it can only stay recording for 1-2 hours fully charged, other than that its a great device.

sony do not have build in screen. troublesome.

Well i'm GP4 Silver user and yes your point is right.
Even on slowly walking the video captured looks very shaky.

get gopro4 silver. U will not regret. So far no software issue. Xiaomi yi got software glitch.

here is what gopro fanboy says about sony...
the recording angle are small, due to the image cropping used for image stabilizing. (same thing like pspslim said, stablizer is useless)
the video looked soft (well, from all the cropping stabilizer algorithm, image tend to drop in quality)
here is what sony fanboy says about gopro...
their video look like you are sitting on the waasasasshhihihiing maccchhhinneeenneneeneee.... (i watched side by side comparison of bike ride video, it is DAMN obvious!... well, thats because its side by side comparison... if u watched it without comparison, u wouldn't know the differences, the feeling is like one person handheld a video cam vs one person using glidecam - floating feel)
thier color is so dulllllll and washed out, requires a lot Post processing. sony straight out can use.

but, if you have intention to use it at night.... let it be as for video camera purpose or riding.... sonyas200 will win a mile.

as for batterylife... its normal... building smaller and smaller, battery get small too. afaik, gopro has external battery pack direct connect to extent its life...  i have not seen sony has it yet (correct me if im wrong)

i just share what i know... i might be wrong in some aspect point of view.
edit: sidenote: sony stabilizer can be off to gain back the full angle for recording.

to me, the image stabilization is minor, because GP4 Silver are build for sports, and sports requires alot of movements, based on the video clips GP4 silver shows, i never see any instability on the video captured, even when the GP4 Silver is mounted on animals, it still gives out a stabilized video. So yeah =X

IMHO

Image quality, sony win against gopro hero 4 silver

Accessories and versatility, gopro hero easily win over sony

Many third party gopro accessories available and ready in the market

Sony accessories price always premium.

Sony as200v seems like a lil bit bulky (mini handycam size)

gopro hero 4 silver come with touch screen lcd, and adventure edition come with diving housing waterproof up to 30m depth.

I recommend you to use gopro hero 4 silver, simply because: You gonna use it for cycling, and with gopro you can easily mount it anywhere you want.. helmet, monopod / selfie stick, bike frame, handle bar, car window, etc (various type of mounting available and easily support its size & weight)

and if you gonna use the sony i believe its gonna be to bulky to mount it on your helmet..

comparison image quality: https://www.youtube.com/watch?v=vqMiuKmulNc

If you are not professional shooter, no point you are getting black edition. because black edition come with more feature and for pro, but Gopro 4 Black edition did not come with the lcd screen. you have to purchase it separately as additional accessory

I was in similar dilemma choosing between black or silver. And yes I am in the video industry and yet decided to go for silver edition.

Black edition with original additional lcd backpack screen will cost you easily over 2k.

If i were you here is my plan:

Hero 4 silver adventure edition: RM1369 (lowest in the market)
Triple Charger battery + 2 Additional Battery from smatree RM 149 (trust me you need at least additional 1 battery. and i recommend minimum of 2 spare battery for you. but for me now i have 5 spare battery)
Monopod stick third party
Helmet Mount third party
Bike clamp third party
Aluminium CNC case
floaty handgrip for swimming
anti fog for swimming..

some pic for your reference..


Hope it helps, cheers...

aiks.. u gave me the link in earlier post dude..
for accessories i purchase online from china

If you are not professional shooter, no point you are getting black edition. because black edition come with more feature and for pro, but Gopro 4 Black edition did not come with the lcd screen. you have to purchase it separately as additional accessory

I was in similar dilemma choosing between black or silver. And yes I am in the video industry and yet decided to go for silver edition.

Black edition with original additional lcd backpack screen will cost you easily over 2k.

If i were you here is my plan:

Hero 4 silver adventure edition: RM1369 (lowest in the market)
Triple Charger battery + 2 Additional Battery from smatree RM 149 (trust me you need at least additional 1 battery. and i recommend minimum of 2 spare battery for you. but for me now i have 5 spare battery)
Monopod stick third party
Helmet Mount third party
Bike clamp third party
Aluminium CNC case
floaty handgrip for swimming
anti fog for swimming..

some pic for your reference..


Hope it helps, cheers...