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Could anyone give us some advice as to improving the batteries in Push n Shove as the ones weve got seem to keep letting us down! The bot is a 4WD pusher wired in parallel with 4 12V drill motors, 2 electronize speedos and 2 12V drill batteries. Wheels are solid rubber 75mm diameter. Wed like a bit more speed and something more reliable (they either run out of charge part way through a battle or get too hot). We dont really want to spend a fortune though!!!
Slightly higher voltage and more amp hrs.
14.4v perhaps?
Cheap .......you could perhaps consider a better drill battery/s .....perhaps something like this?
http://cgi.ebay.co.uk/BOSCH-14-4-VOLT-2-6ah-NiMH-BATTERY_W0QQitemZ300008776047QQihZ020QQcategoryZ20 777QQrdZ1QQcmdZViewItemhttp://cgi.ebay.co.uk/BOSCH-14-4-VOL...300008776047QQ ihZ020QQcategoryZ20777QQrdZ1QQcmdZViewItem
i sell batteries on my online shop, which will be online in the next day or two.
email me and ill talk you through the best options
cheers
james
Will email you James. Thanks for your suggestion Woody, Ive put a watch on it. With better batteries, would it also be better if it was wired in series?
a set of average nicads/nimh from my store, or any store for that matter (providing they are new or almost new condition) should last you perfectly well as a 14.4v pack.
paralleling up the drill batts was only needed as they are really low quality. anything on my store list will work fine without paralleling up neccessary.
prices from £8.50 per 7.2v and you are sure of their quality, be careful buying on ebay, batteries have a lifespan, you may be getting batteries at the end of theirs
yep i agree with JB there, it is risky buying batteries from ebay!
Cheaper batteries would be ok if you could wire up another set in parrallel to give it the same voltage but twice the amperage-but its a big waste of weight. 2400mA nicads/NiHms should be perfectly fine
Although----looking at those on ebay, if there brand new and never been charged they will be perfect!
but still unlikely to be as good as a new set of nimh. dont see the point in buing them for the same price as 3000mha racepacks, but hey, each to their own
If a pack has not ever been charged then they will stay as new untill charged! thats why lots of companies buy in bulk because it doesnt matter when they are sold.
If it works out cheaper buying the 3000mA batts then i would say buy them for deffinate, but if those drills are cheaper i would go for that option, but its upto you
Id go for the 3000ma batts, even if there a bit more expensive, but not if there too expensive
Rather than start a new thread, im looking to replace my batteries in Conundrum Mk2 before the champs, what do people recommend I get and where from. Keep in mind that I am running a hungry Ev warrior and a couple of drill motors, at the moment it seems to run ok on two heavy 3Ah 12v BotPacks, just want an upgrade.
Chris - ^_^
I am having a problem charging my batteries . I have a modified PSU and a Pro Peak constellation charger . When ever i want to charge my 3300mah 24v pack at anything over 2 amps i get an error message saying Input Voltage 11.60v Is there a solution to this ?
get a better powersupply, the amps drawn from the PSU make the voltage sag beneath the minimum value of the charger hence the error
Thanks alot Tim , Does anybody know any good power supply units ?
We had this problem with three different power supplies that we tried. In the end bit the bullet and bought a big one from Rapid Electronics. Many teams use the same one. (order code was: 85-1828) Cost about £110 inc del.
Chris stick with the botpacks if you can otherwise, race packs/indivual cells, if your confident of making up good packs, of GP3700 NiMH
If you go to chargers and PSUs at http://www.technobots.co.ukwww.technobots.co.uk - both the 13.8v 20amp Power supply (1090-016) and the 13.8v 20A Dual Output Power supply (1090-017) are both ideal not to only run 1 of your chargers at MAX ratings, but attualy 2. I think they say you need about 8 or 9amps supply to each charger for it to work to its max. So a 20amp supply will quite happily do 2 chargers. And the cheaper one at £34.12 which i use, does one charger perfect, and also ran 2 chargers without problems when people borrow the supply from me as well. LOL - *COUGH* Pete/Jonno *COUGH*.
Mr Stu
We had this problem with three different power supplies that we tried. In the end bit the bullet and bought a big one from Rapid Electronics. Many teams use the same one. (order code was: 85-1828) Cost about £110 inc del.
Chris stick with the botpacks if you can otherwise, race packs/indivual cells, if your confident of making up good packs, of GP3700 NiMH
We use one of the 40A power supplies - theyre £136 plus delivery from Technobots (so about £140) but you can get the same charger from Rapid Electronics for £109 including free delivery
Link on the Rapid website is
http://www.rapidonline.com/productinfo.aspx?kw=85-1828&tier1=Electrical%2B%26%2BPower&tier2=Power%2B Supplies&tier3=Switch%2BMode%2BPSUs&tier4=25A%2f40 A%2BSwitch%2Bmode%2Bpower%2Bsupplies&moduleno=6506 3http://www.rapidonline.com/productin...rical+%26+Powe r&tier2=Power+Supplies&tier3=Switch+Mode+PSUs&tier 4=25A%2f40A+Switch+mode+power+ supplies&moduleno=65063
Weve had ours for around 3 years now without any problems.
Ed
http://www.teamstorm.comhttp://www.teamstorm.com
Ed I wish you had put that post on here 2 weeks ago :)
Sorry Gary - if its still 7 days from the day after they were delivered to you then you can always cancel your order (Distance Selling Sale of Goods Act) however if its after then theres nothing you can do :sad:
Sorry !
Ed
http://www.teamstorm.comhttp://www.teamstorm.com
ahh dont worry about it. I have one and it works fabby so I am happy. So much better to be able to charge a hawker in half an hour rather than a few days!