KevAmiga Posted August 22, 2017 Share Posted August 22, 2017 Hi all - quick question. I have been looking at batteries for my Basha Rocksta crawler, and have found this : https://hobbyking.com/en_us/turnigy-nano-tech-450mah-2s-65c-lipo-e-flite-compatible-blade-130x-eflb3002s35.html?gclid=CjwKCAjwrO_MBRBxEiwAYJnDLN7Y0HoiD8NlHA1yrlEe8dNgF_fwK7u44xt2c0VGc0-VMN_YfP0OaBoC8v8QAvD_BwE&gclsrc=aw.ds Looking at online videos, these seem to be about the biggest one can fit in the battery box of the Rocksta, however the connection is obviously wrong. Can someone point me in the right direction to wire the "balance style" plug on that battery (apologies i dont know its name) to a standard JST plug for the Rocksta? Thanks! Kev 1 Quote Link to comment Share on other sites More sharing options...
Fly In My Soup Posted August 23, 2017 Share Posted August 23, 2017 You could, in theory, simply remove the balance plug then snip out the middle blue wire, leaving your post/neg (red/black) to wire on a hat plug. Two issues you may face....The gauge of wire used for jst is smaller than even these silicone balance tap leads....Secondly, depending on what motor your running, the amp draw from this batt may cause your soldering joins to fail Quote Link to comment Share on other sites More sharing options...
Isle of Wight Basher Posted August 23, 2017 Share Posted August 23, 2017 Hows about an adapter lead like this http://www.ebay.co.uk/itm/JST-XH-2S-FEMALE-22cm-to-JST-BEC-MALE-WALKERA-G-2D-X6-V262-V333-V666-LEAD-WIRE-/162617432202?hash=item25dcc1188a:g:X0kAAOSwH71XO1ki Quote Link to comment Share on other sites More sharing options...
dazp1976 Posted August 23, 2017 Share Posted August 23, 2017 17 minutes ago, Fly In My Soup said: You could, in theory, simply remove the balance plug then snip out the middle blue wire, leaving your post/neg (red/black) to wire on a hat plug. Two issues you may face....The gauge of wire used for jst is smaller than even these silicone balance tap leads....Secondly, depending on what motor your running, the amp draw from this batt may cause your soldering joins to fail What he said From the specs they suggest 0.45A x 65C = 29.25A So the wire should be able to handle a constant 29 Amps maximum. So base it on that. If you generally pull more amps than that then it needs a re-think 1 Quote Link to comment Share on other sites More sharing options...
dazp1976 Posted August 23, 2017 Share Posted August 23, 2017 4 minutes ago, Isle of Wight Basher said: Hows about an adapter lead like this http://www.ebay.co.uk/itm/JST-XH-2S-FEMALE-22cm-to-JST-BEC-MALE-WALKERA-G-2D-X6-V262-V333-V666-LEAD-WIRE-/162617432202?hash=item25dcc1188a:g:X0kAAOSwH71XO1ki You could but I'd say the cable on it would be even thinner than the actual battery one. Quote Link to comment Share on other sites More sharing options...
Isle of Wight Basher Posted August 23, 2017 Share Posted August 23, 2017 The important factor is what the car esc/motor draws not what the battery can deliver, even a small battery can give out 100's of amps when short circuited. Quote Link to comment Share on other sites More sharing options...
Fly In My Soup Posted August 23, 2017 Share Posted August 23, 2017 (edited) 1 hour ago, Isle of Wight Basher said: The important factor is what the car esc/motor draws not what the battery can deliver, even a small battery can give out 100's of amps when short circuited. Well i don't think he's aiming to short it out.... I understand what your saying....The motor/ esc want to draw a certain figure regardless of what the battery can supply... Although what the battery can actually supply it with is usually limited with the stock battery, in this instance he's upgrading to a high discharge battery, which will obviously supply the motor/ESC with whatever draw it requires... So in some ways... Both of the figures for draw and supply are dependant on each other, and as such both figures are important to determine final current supply being fed through the lead. Edited August 23, 2017 by Fly In My Soup Quote Link to comment Share on other sites More sharing options...
Isle of Wight Basher Posted August 23, 2017 Share Posted August 23, 2017 38 minutes ago, Fly In My Soup said: Well i don't think he's aiming to short it out.... I understand what your saying....The motor/ esc want to draw a certain figure regardless of what the battery can supply... Although what the battery can actually supply it with is usually limited with the stock battery, in this instance he's upgrading to a high discharge battery, which will obviously supply the motor/ESC with whatever draw it requires... So in some ways... Both of the figures for draw and supply are dependant on each other, and as such both figures are important to determine final current supply being fed through the lead. Well I didn't think he was ! No need for your sarcasm. My point is that wire gauge isn't determined by the power that can be supplied but by the power drawn in normal operating circumstances. It's only the power demand that will determine the current drawn. I disagree with your stock battery statement but I'll bow out here. Quote Link to comment Share on other sites More sharing options...
KevAmiga Posted August 31, 2017 Author Share Posted August 31, 2017 The amperage draw from the Rocksta should be low, I dont invisage the wiring being a problem. As it goes, the little zippy 300 battery came and its doing the job just fine for now Quote Link to comment Share on other sites More sharing options...
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