I think everybody is missing a point here. SLA's are SLA's. There all crap compared to the newer technology but they do work and at a reasonable price. Chargers are common, cheap, and easy to use. The batteries in question are a common forma factor (I use two of this type in the Cromwell). These cheap batteries might be a good option for someone to use for building and testing. After they have the tank built, you can then upgrade to the $80 (each) Werker 12V 20AH deep cycle's that run the Cromwell for a good hour.
ST On Thursday, December 13, 2012 9:52:53 AM UTC-5, [email protected] wrote: > > Which is another reason to stay away from them. Those 7AH batteries I > used for testing only powered the KV for about 3 min before noticeably > draining. I need batteries that can deliver more amps for longer. Hence > wanting to go with the LiFEPO4 bats. > > Derek > > On Thu, Dec 13, 2012 at 8:20 AM, <[email protected] <javascript:>> wrote: > >> its not half the power though, the way lead acid batteries and for that >> matter most all batteries work is their voltage drops with power draw. a >> 17Ah battery thats rating out at 10Ah is for all intents junk, its voltage >> drop will be far greater than that of a healthy 17Ah battery, greater than >> simply the straight amp difference the the batteries rating out at 10Ah >> will also not be able to supply the same current draw before overloading. >> Id be leery of buying these batteries >> >> ------------------------------ >> *From: *"Joe Sommer" <[email protected] <javascript:>> >> *To: *[email protected] <javascript:> >> *Sent: *Thursday, December 13, 2012 7:13:14 AM >> *Subject: *[TANKS] Re: 12V17Ah batteries for $10 ! >> >> >> >> >> On Wednesday, December 12, 2012 8:04:20 PM UTC-5, RocketMan wrote: >>> >>> The seller says the tested spec is closer to 10Ah. Still, they aren’t >>> going to get any less expensive than this: >>> http://www.goldmine-elec-products.com/prodinfo.asp?number=G19025 >>> >> Doug, >> >> I put two in my shopping cart and checked shipping. >> $20.00 for two batteries >> $24.20 for shipping >> Total = $44.20 for two >> >> eBay item 170883786550 >> RBC7 two 12V 18Ah SLA batteries >> free shipping >> Total = $72.48 for two >> >> About half-power for about half-price >> >> Joe >> >> -- >> You are currently subscribed to the "R/C Tank Combat" group. >> To post a message, send email to [email protected] <javascript:> >> To unsubscribe, send email to [email protected]<javascript:> >> Visit the group at http://groups.google.com/group/rctankcombat >> >> -- >> You are currently subscribed to the "R/C Tank Combat" group. >> To post a message, send email to [email protected] <javascript:> >> To unsubscribe, send email to [email protected]<javascript:> >> Visit the group at http://groups.google.com/group/rctankcombat >> > > -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
