Pulse Tech X2 Xtreme Charge 2- Station Battery Maintenance System XC2

I have tried a variety of chargers. This is one of the best around. I have three of these chargers in various locations. I hook up all my vehicles and spare batteries when not driving to keep the batteries at optimum condition. (One should always keep Lead-acid type batteries in a fully charged state, and never fully discharge them.)I also used this to bring some of my older batteries back to life. For example, one of the older batteries would only register 12.6V when charged with a conventional charger, and quickly settled to 12.1 V at rest. After 4 days of pulsing, the battery is at 13.2V fully charged state, and 12.8V at rest. This battery can be used to help neighbors jump start cars, and it runs some 12V devices effectively during power outages.Warning: Do not connect this to a bad battery that has a short. The battery will draw current at a high rate from the charger, and the charger gets very hot. Although I caught it in time, it may overheat and damage the charger. Always monitor the charger for a few hours when hooking up to an old battery, to watch for over-heating. Or test to determine that the battery does not have a short before hooking up.I am also using this to try and maximize the life of the newer batteries.Update 1/3/2016The battery that was brought back (see above) finally failed, but I got a few more years out of it. Every battery will eventually fail. Even when a battery is reconditioned, there will be some buildup that will occur that will ultimately shorten the life of the battery or reduce its performance.In 2012, I got a new Wet and a new AGM car battery. I tested them and recorded their baseline measurements. Every evening (when possible), I connected it to the charger. Both batteries have a 36-month warranty, and they are now well past their warranty period. When compared to their baseline measurements, they are not "new" anymore. However, they still have significant life left and performed well on: voltage, load test, and digital analyzer. I will update when these batteries finally fail.I also conducted tests comparing this charger to other chargers that I had or borrowed from friends. I used the same battery, charged it until the float came on, disconnected the charger, waited 15 minutes and took a measurement (voltage and digital analyzer), and waited 24 hours and took a measurement. I also used chargers on the same battery in different orders of charging. Overall, Pulse Tech appears to more fully charge a battery, as the measurements were always better using this charger.I also got used batteries from friends. A few could be brought back. Usually, the very damaged batteries could not be brought back to life.Conclusions at this stage of use:-Good battery maintenance charger, especially for new or good batteries-Better charging of battery-Lightly damaged batteries may be recovered to get additional use-Probably will not recover poor condition or highly damaged batteries

Convinced by the concept of distributed battery equalizing or charging, to put it simpler, I decided to use this unit to improve things in my home UPS. This is an old APC 1200VX for which there is ABSOLUTELY no technical support (I guess because of its age, and because APC is more interested in selling new equipment than supporting what they call obsolete stuff).My UPS is a great design. I have run oscilograph tests of its transfer from mains to battery backup, and it is flaw-less. The output is sinusoidal, or as close as possible without actually doing an analysis. And it is really sensitive to supply fluctuations that I don't even perceive.However, I found the charging voltage, among other operating parameters, were not quite right. An exhaustive search on the internet turned up absolutely nothing (apart from APC's attitude). I attempted to identify different adjustments, and managed to readjust the transfer level (when the UPS decides that the commercial voltage is unacceptable, so as to activate the inverter).I tried adjusting what I thought was the the charging voltage control, but to no avail. See. it's not really easy to identify which anonymous pot does what.I had installed two new deep-cycle batteries from the same manufacturing lot - rather than the original on-board VRLA's - and was appalled to see they didn't level out in voltage. One took on a notably higher voltage than the other, obviously starving the brother in the process. Several attempts with a resistor in parallel with the "stronger" battery only helped momentarily.I installed the dual charger.Initially, I could see that one or other battery would be on charge, then the other. After a while it levelled off. The terminal voltages are now equal, at about 13.7 volts. The pulsing goes on, and no problem. I never see the charger function activate, unless that is there is a supply problem. Then each charger takes charge of its asigned battery. Nifty!I should mention that the UPS has a built-in charger, designed to charge two 12-volt 26Ah VRLA batteries in series. State of the art thought has is it that you should really try to charge on an individual level when at all possible. Like, charge each 12-volt unit on its own, which is what I'm doing. Others have invented devices that drain off from one battery to up the charge on another. I am still studying this, but the idea is the same, basically.The original APC charging circuit is still connected, but the X2 is connected to the individual (deep-cycle) batteries, sort of in parallel. There have been power failures, and I have seen the X2 react by recharging the batteries, probably better than the APC charger could ever do.This is my argument. I am still studying the pulsing effect, and hope to rig up a recorder of sorts to see what is actually happening. Depending on voltage and current levels (especially in the pulsing), I may use a Flukescope, and/or a Megger PA-9.Oh, yeah: Just bought a single charger unit for other needs. I guess I am convinced ... but I will continue to study this.

i bought this because i read a review of the single output version of this battery charger on [...] back in 2007. for 5 years, i was very skeptical about the claims the manufacturer made about their technology being able to improve the condition of a battery. i was even more weary of paying the price for one when yuasa branded chargers and deltran battery tenders could be had for a fraction of the price. lately, i have been noticing a trend among the batteries in my motorcycles. for the first couple of weeks after buying new batteries, they crank the engines really well. then even if i kept them on a charger (yuasa or deltran, i've had both) any time the bikes weren't running, the battery performance would drop and get to cranking the engines slowly again within a few weeks. i even bought a brand new bike last year, and the brand new battery that came in it seemed like it was barely capable of turning the engine over. so i decided to bite the bullet and fork out the money to see if the manufacturer's claims are true. i like trying out new, interesting stuff once in a while, and with this dual output charger, i can plug both my bikes in and only use one power outlet in the garage.this is one of those very few cases when i can say that the manufacturer's claims are definitely true. both of my bikes turn over MUCH faster after a couple of weeks of being hooked up to this battery charger. the technology just flat out WORKS. if you're in the market for a battery charger/maintainer, i definitely recommend giving this one or it's single output counterpart a try. yeah, they're expensive, but so are motorcycle batteries. i only wish i had bought one of these back in 2007 instead of waiting so long and thinking that the cheapo yuasa and deltran chargers were just as good. try one of these, and i think you'll be impressed.