Search found 34 matches

by 7tronics
Jul 16 2013 4:15pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1676
Views: 497460

Re: Homemade Battery Packs

Thanks for the advice. The two Currie TrailZ we have are equipped with the 250w motors so I thought running these as a single series combination would be adequate, but should we upgrade to a 450w motor we can see that running these LiFePO in series + parallel would be essential to battery life. agai...
by 7tronics
Jul 16 2013 12:01pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1676
Views: 497460

Re: Homemade Battery Packs

On the VERY simple end, I have two Clean Republic Bamboo LiFEPOs in an eZip RMB pack. This was a 30 minute job to install in an older eZip Mountain Trailz (2009 model) RMB gray battery container. It is a wonderful step up from an aging SLA pack. Not sure it is even worth posting a photo this upgrade...
by 7tronics
Jul 15 2013 12:52pm
Forum: Battery Technology
Topic: Using SLA chargers for LiFeP04 batteries
Replies: 52
Views: 8543

Re: Using SLA chargers for LiFeP04 batteries

I ordered two of the Bamboo replacements from Clean Republic as well. I am using a Currie 24v "Lithium" charger which came with a Currie Via Rapido and 24v LiFePO "RTMB" rack mount pack. I am replacing the 24v AGM/gel cells on the two Trailz ebikes with two Clean Republic LiFePO batteries. The same ...
by 7tronics
Jul 02 2013 12:11pm
Forum: Battery Technology
Topic: LiFePO4 batteries in the 12 volt "gel cell" format
Replies: 29
Views: 4191

Re: LiFePO4 batteries in the 12 volt "gel cell" format

I see alternatives in 12v 10ah and 12v 12ah "Gel cell/AGM" formats from: K2 Bioenno Power Tenergy Shorai Are any of these batteries ones people on the list can report experiences? I see K2 referenced earlier, but none of the others. There is more information from Bioenno Power and Shorai, the latter...
by 7tronics
Jul 02 2013 10:40am
Forum: E-Bike General Discussion
Topic: Currie Technologies replacement batteries
Replies: 13
Views: 1527

Re: Currie Technologies replacement batteries

For over a decade, we've been rebuilding various Currie VRLA (valve regulated lead acid "gel cell" aka SLA or AGM) Battery packs for our stable of Currie ebikes. The Currie 12ah and 10ah batteries can be replaced with lighter, lower AH batteries, of course you get less range. We now have 3 of the Cu...
by 7tronics
Jun 14 2013 10:21am
Forum: Battery Technology
Topic: How to rebuild Currie 24v RTMB pack?
Replies: 3
Views: 903

How to rebuild Currie 24v RTMB pack?

For our family's own Currie Via Rapido, we've noticed after a couple of years of at least a few times a week riding in spring, summer, and early fall, the Li pack has degraded noticably in peformance and range. The standard RTMB 24v 10Ah performance and range were fine when first acquired (used) but...
by 7tronics
Jun 14 2013 10:19am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1646
Views: 231547

Re: Large format NIMH Nilar cells from colorado advanced bat

The Nilar 10Ah 24v pack is now leaking and retired. It was a decent pack for a few years, but had dropped off in performance and capacity before I noticed some leakage near the - terminal. Interesting, I did get a $350 replacement Giant 24V 6Ah pack for the Giant LaFree Lite at about the same time i...
by 7tronics
Jun 14 2013 9:49am
Forum: Battery Technology
Topic: EZip 24v RMB batteries under $60; justifying 5x-8x price Li?
Replies: 7
Views: 1555

EZip 24v RMB batteries under $60; justifying 5x-8x price Li?

With so much written here about great ways to upgrade your ebike with Li based batteries, I ask for some advice to give to locals here who just want to have decent range with their not terribly frequently used EZip bikes and their 24v lead acid packs. I have installed several AGM 9Ah-10Ah batteries ...
by 7tronics
Mar 17 2011 2:51am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1646
Views: 231547

Re: Large format NIMH Nilar cells from colorado advanced bat

I have a 24V 10AHr battery that I bought almost 2 years ago. It works fine for the 400W 24V motor on my 2001 Currie Mountain eBike with 400W BMC motor and I run it fairly light on eBike assist. Also used in a pinch as an electric mower battery! I see that Colorado Advanced Battery seems to have shut...