{"id":1984,"date":"2003-07-21T12:00:48","date_gmt":"2003-07-21T20:00:48","guid":{"rendered":"http:\/\/lee.org\/blog\/?p=1984"},"modified":"2008-05-08T09:39:08","modified_gmt":"2008-05-08T17:39:08","slug":"battery-comparison","status":"publish","type":"post","link":"https:\/\/www.lee.org\/blog\/2003\/07\/21\/battery-comparison\/","title":{"rendered":"Battery Comparison"},"content":{"rendered":"

Optimally, I’d want a battery 1500mAh battery, under 10 mOhm, under 30g. 20mOhm is right out. Here’s stats from Sanyo’s website<\/a><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Name<\/td>\nmass<\/td>\nmOhms<\/td>\nprice<\/td>\ncomments<\/td>\n<\/tr>\n
KR-800AAE<\/td>\n23g<\/td>\n12<\/td>\n.<\/td>\n<\/td>\n<\/tr>\n
KR-1500AUL<\/td>\n31g<\/td>\n16<\/td>\n.<\/td>\n<\/td>\n<\/tr>\n
KR-1400AE<\/td>\n31g(1.09oz)<\/td>\n10<\/td>\n$2.35<\/td>\n<\/td>\n<\/tr>\n
KR-1500AUL<\/td>\n31g<\/td>\n16<\/td>\n.<\/td>\n<\/td>\n<\/tr>\n
HR-4\/5AUP_Ni-MH_1700<\/td>\n34g<\/td>\n6<\/td>\n$4.40<\/td>\nNi-MH must be charged slower<\/td>\n<\/tr>\n
CP-1300SCR<\/td>\n35g<\/td>\n6.5<\/td>\n$4.25<\/td>\nsee comparison below<\/td>\n<\/tr>\n
KR-1700AU<\/td>\n36g(1.17oz)<\/td>\n17<\/td>\n$3.95<\/td>\n<\/td>\n<\/tr>\n
HR-4\/5FAUP_Ni-MH_1950<\/td>\n39g<\/td>\n5<\/td>\n$4.60<\/td>\n<\/td>\n<\/tr>\n
CP-1700SCR<\/td>\n46(1.62oz)<\/td>\n5.5<\/td>\n$3.60<\/td>\ntoo heavy<\/td>\n<\/tr>\n
N-1700SCR<\/td>\n54g<\/td>\n4<\/td>\n.<\/td>\ntoo heavy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

comparison according to Sanyo charts:
\nCP-1300SCR – drained after 8C for 6.9 minutes. that’s 10.4 amps for 6.9 min (.115 hrs). 10.4 * .115 = 1.196 amp\/hrs
\nKR-1700AU – drained 8C for 5.2 minutes. that’s 13.6 amps for 5.2 min (.087 hrs). 13.6 * .087 = 1.1832 amp\/hrs
\nConclusion: you get an insignificant 1% more amp\/hrs out of the CP-1300SCR during high drain applications (like flying wide open throttle). At lower drain, like when cruising around, the KR-1700AU does better.<\/p>\n

The HR-4\/5AUP looks like the best candidate. Andrew Mileski on the Zagi group says it’s his favorite and that’s good for something. It pains me slightly to spend $70 in batteries + $20 pack making supplies… Hmm. But thinking about it, I’ll then have 2 complete kick-ass packs for $45 apiece. So the cycle would be: fly the 2 new packs for 25 min. Fly the 1100 Ni-MH for 10 min while letting the pair cool. Start charging the new pair at 1.5C. Fly the 1700 Ni-Cad pack for 15 min. Sit out for 30 min. Then start charging the 1100 Ni-MH and start flying the pair for 25 min.<\/p>\n

I suppose the best and most simple configuration would be for me to have 2 pairs of batteries and a charger with a charge delay. Then it would be:
\nfly pair #1 for 25 min
\nplug pair #1 in (with a 5 minute cooling delay on the charger) at 1.5C and fly pair #2 for 25 min
\nsit out for 20 min
\nplug pair #2 in at 1.5C and fly pair #2 for 25 min<\/p>\n

But now I’m just fantasizing…<\/p>\n","protected":false},"excerpt":{"rendered":"

Optimally, I’d want a battery 1500mAh battery, under 10 mOhm, under 30g. 20mOhm is right out. Here’s stats from Sanyo’s website Name mass mOhms price comments KR-800AAE 23g 12 . KR-1500AUL 31g 16 . KR-1400AE 31g(1.09oz) 10 $2.35 KR-1500AUL 31g 16 . HR-4\/5AUP_Ni-MH_1700 34g 6 $4.40 Ni-MH must be charged slower CP-1300SCR 35g 6.5 $4.25 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1984","post","type-post","status-publish","format-standard","hentry","category-rc"],"_links":{"self":[{"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/posts\/1984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/comments?post=1984"}],"version-history":[{"count":0,"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/posts\/1984\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/media?parent=1984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/categories?post=1984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lee.org\/blog\/wp-json\/wp\/v2\/tags?post=1984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}