TunedRX300

Here is what I ordered for my other car since its battery is dying.
I will definitely try to install it on RX if I have the time and energy. Especially for our friend Lexmex. Braille told me this model should fit most cars.


B3121 No-Weight Extreme Battery Specs

Weight: 21 lbs
Length: 6.6
Width: 5.2
Height: 6.8
Pulse Cranking Amps: 1380
Cranking Amps: 742
Cold Cranking Amps: 550
Amp Hour Rating: 31
Warranty: 1 Year Free Replacement / 2 Year Limited Pro-Rated Extended Coverage

Compare to Optima Redtop
Part # 35 (9020-164)
Cold Crank Amps 720
Crank Amps 910
Reserve Capacity 90
Ampere Hour 44;
L-9 5/16 in.; W-6 13/16 in.; H-7 5/8 in.

OEM battery weight around 50 lbs

Lexmex

That's what my buddy put in his Vette, the 21 pounder. It is not a big battery and was a bit smaller than his stock GM battery (about the size of the OEM RX300 battery). Their headquarters are just south of me in Sarasota, so we took a trip down there to buy it. I am actually thinking about getting one of their lighter batteries for my RX, but just waiting for the Optima to hit the fritz (which I have had for 3.5 years).

TunedRX300

Braille told me smaller and lighter model would have less juice capacity and need their universial fit kit to work.
CCA around 550 is what other cheaper and heavier batteries offer. So I would not want to go below that.
Shaving off more than 20 lbs of dead weight is welcome, considering the gas saving and better acceleration and braking over the entire life of the battery.

Lexmex

They do have a bit less juice capacity as you go down in weight. I think one of them was to wide for my friend's Vette so went with the 21 pounder. They also seemed to have less height.

archangels

sweet let us know what differences you experience with this product i am sure it will be nice with your sun hyper voltage product, i want to buy one of these in the future... how can you tell how much battery life is left would checking voltage help?

TunedRX300

Autozone can bench test the battery and charge it for free.
I had Autozone Duralast, which is made by Johnson Controls, CCA is 600, Cranking Amps 750, RA is 110.
Braille battery juice capacity is just a little below Duralast, just 20 pounds lighter and $100 more expensive.

HarrierAWD

A light weight battery can help those with bad backs and weak biceps as well. Though it does not advertise its reserve capacity, so its longevity is questionable. Also it's 1yr free/2yr pro-rate warranty is short compared to other batteries in the market, typically 2-3 years free replacement with up to 8 years pro-rated. Hope it works out well for our friend TunedRX300.

My 6.5-year-old Matsushi-ta OEM battery shows no sign of aging. The last battery load test also checked out fine by Lexus. When the time eventually comes, I'll definitely replace it with OEM (if I can find it.)

TunedRX300

Someone just paid $110 at Lexus dealer for an Interstate battery manufactured for Lexus. Factory installed one lasted me the shortest, only 3.5 years. To those who understand performance, lighter means the engine will be able to provide the same acceleration rate with less gas. That is efficiency.

archangels

when choosing a battery what do you look for besides weight to benifit thanks, is the higher the cranking amps the longer and stronger the battery? thanks
what are these what they mean in details thanksPulse Cranking Amps: 1380
Cranking Amps: 742
Cold Cranking Amps: 550
Amp Hour Rating: 31

archangels

how much are those 21pounds braille batteries? thanks

bob2200

I'm a bit skeptical of very light-weight batteries using the same (i.e., lead/acid) technology.

Years ago, they used to sell nickel-cadmium batteries for cars. Not many sold in the US, since they were very expensive and maybe needed a special voltage regulator. I think they still use nickel-cadmium wetcell batteries in airplanes, so I bet they weigh less than lead-acid.

I can understand the trade-offs of lead-gellcell batteries and lead-acid batteries with cylindrical (rather than rectangular) cells. You might be interested to know that the old AT&T (Western Electric Co) favored cylindrical lead-acid wetcell batteries [just like they favored horn microwave antennas instead of dish antennas].

Anyway, the weight of car batteries is mainly lead and battery acid and it's a well-developed technology and they don't add these things for no reason. I don't think the weight of the plastic case is significant. There have got to be trade-offs in my opinion.

TunedRX300

Perhaps I am naive, Braille indicates it is using Enhanced Mat Technology to increase more surface area on the lead plates. More surface area means less lead to generate power, which translate into weight saving?

TunedRX300

Tirerack has $181 plus shipping with mounting bracket and hooks included.
The 21 lbs one is sealed, you can mount it standing up or sideways because the brass posts can support both.
I bought it from Braille directly, they individually tested each battery, the one I bought had 842 cranking amps instead of 742.
http://www.tirerack.com/accessories/...mount_21lb.jsp

archangels

Pulse Cranking Amps: 1,380
Cranking Amps: 742
Cold Cranking Amps: 550
out of all 3 which one's the one you mainly look for is it cranking amps or the other 2 thanks

TunedRX300

PCA and CA, they are good measurement for my usage, which is the ability to start a car in non-freezing weather.