Yes displacement is the same, solid or hollow.
Only the mass changes and with that the density and the ‘weight’ (downward force, F = mg)
So lets calculate it.
Fb = ρgV
Fb = buoyant force
ρ = density of the liquid
V = volume
Lets assume a volume of 1.5 liters = 0.0015 m3.
Fb = 1000 kg/m3 x 9.8 m/s x 0.0015 m3 = 14.7 N
Lets take a mass of 1.65 kg
Fg = 1.65 kg x 9.8 m/s = 16.17 N
16.17N > 14.7N , so no whit these numbers it wont float.
If you look close you see that with this density it leaves to the simple conclusion that the amount of volume is exactly the amount of mass an object need to have to cancel the forces out.
The only question is what density has the GT? Fully loaded probably more than water but without the cells and carriers it could be pretty close.
Had to write it down for myself to remember everything.
Your 9800mAh will most certainly only be 1800mAh (if you are lucky)
Such trash batteries (which are most likely repacked waste calls)
will have a large mismatch, and the performance, when used in series will be even worse…
Nowadays you get a very good 18650 cell for $5.- and less.
So no need any longer, to look for repacked, second hand, budget cells…
Steel_1024 was asked by Neal to test one of the lights because he’s familiar with NarsilM and he’s close by in Taiwan. He found the 2 flaws that were already mentioned by Texas_Ace. The boot cover that is not transparent enough and a wrong fuse setting in the firmware. These are the 2 things now being fixed on the other production lights. Lumintop is on top of the situation.
The GT uses two carriers of 4 cells in serie which is a rather delicate configuration, but necessary for voltage. It mandates to use four quality cells of the same type, from the same manufacturer and possibly from the same batch. Those cells should always stay paired and used with the same state of charge. The cells you mention are probably poor quality and should certainly not be used in serie four at a time.
Stay with the brand names: Sony, Panasonic, Sanyo, LG…
Coyotehawk will add you to the list on his next update. It will be early January when you will get a PM (personal message) and e-mail giving you all the details of where to go and how to pay.
