to James Oh hell no!! Excellent post. Stennis- I would completely go away from battery launch- there is nothing like ic engines for quality, longevity, energy delivery density- & let us not forget the well being of the pilot/s- there is just too much to go wrong with batteries!. It’s fairly new, 18 months old, but not used much (a ride every few weeks). I lve in a small town. Thanx a lot, John. He told that he would fox the problem. Hi,after changing battery water my inverter is not charging the battery.what should I do now.plz help. The application is a battery-electric winch for use in launching sailplanes (gliders, not hang gliders). Turning on the headlights for a few minutes will do this. Take specific gravity readings again. I have a voltage gage connected to the cigar lighter of the car and the average reading is 12,02 volts, 11,90 some times. A.Sami: if the current increases more than about twice the stable value before rocking It will last much longer, but the capacity will slightly be decreased. So either get a professional to set it up for you of do your homework, lots of it! As will melted ice water from fridge/freezer-even better. I’m assuming that’s install date. Bevan, we have installed a lead-acid battery bank on a solar system 4 years ago. I HAVE EXIDE INVA TUBULAR BATTERY, IT DRIES UP IN 3 TO 4 MONTHS EVERY TIME I NEED TO ADD ONLY DISTILLED WATER OR ACID+ DISTILLED WATER..?? Load testing is … My experiments have shown that over-charging up to 16v certainly stirs up sediment from bottom of cell/s- mainly fine lead particles- now, whether it is thought that these particles are helpful to rest of cell/s/batt is up to you & everyone else to judge- i don’t think so!. 8 voltage, 9 volts, sometimes 10, and the car didn’t start. When the electrolyte is near the low-level mark, the specific gravity is higher than … After half an hour we puted the battery back in the car, and the battery didn’t give a stable voltage. The black stuff is harmless. Uspower Tech (Only seems to stink of sulfur when I get underway. The hydrometer should give you a numeric reading directly from the instrument. Specific Gravity is an accurate test on a deep cycle batteries health, state of charge and future output. They open like an egg! What should I do ? Kindest Regards I was taught initially that when maintencevon any battery was being performed and that whenever ( distilled ) water was being added, to always afterwards perform a ” equalize ” charge to chemically equalize it which will get the battery up to proper charge. The battery was left discharged too long. Everything looked okay. You will have just killed it. If so, you could try emptying electrolyte out of batt & refilling with new electrolyte- sg depending on type of batt.-eg starter batt=1.260- deep cycle- 1.220 @ 20’C. The excess capacity in the batteries (36 72 Ah 12V starter batteries would hold be about 30 kWh) can be used to buffer the generator during peak launch periods after which the generator could catch back up. This raises the open circuit voltage and the battery appears fully charged. Boost charge 12V batteries at 15 amps until specific gravity is 1.250 or higher and the electrolyte temperature is at least 60°F (15.5°C). Any thoughts on how to further salvage these batteries? The capacity of a storage battery is measured in. Batteries will eventually die, but when and how? A brief charge on a 1–2 hour break during heavy use prolongs battery life. If the battery has been on the charger for more than 24 hours, it should be fully charged. You have to pick and test from the piles. A1*B1 + A2*B2 = (A1+A2)*(target gravity) (3 gallons at 60 gravity points) + (A2 gallons at 0 gravity points [water]) = (3 + A2) gallons at 40 gravity points. They are house batteries. Peak launch frequency might be 6 to 10 per hour with maybe 25 launch cycles in a day pretty busy. When new, a deep-cycle battery may have a capacity of 70 percent or less. They gas all the time even when at a lower voltage, are the plates really clean now so present a larger surface area or would there be sulfation across some of the cells? The acid concentration is light on top and heavy on the bottom. Batteries made from the purest lead that has been processed into high quality positive and high quality negative plates, the purest acid and provided with the purest refill water throughout their service do not last very long. I refilled with distilled water and am hoping for the best (but assume I am probably stuffed and am going to have to replace the battery now). Any chance of getting the s.g. back to 1.265? If this is not practical, switch to an AGM battery. 5. BU-104a: Comparing the Battery with Other Power Sources, BU-104c: The Octagon Battery – What makes a Battery a Battery, BU-105: Battery Definitions and what they mean, BU-107: Comparison Table of Secondary Batteries. You will need to monitor your battery voltage and specific gravity to determine when equalization is needed. 2. I filled them back up in a sense recharge them but I still think I’m lacking some power, any ideas. I put a 12V on a trickle charger (on a metal table top); some days later I see a mass of sugar like gray crystals along the entire base of the battery, an inch high and an inch deep (!) Compare the readings. I have two 6v Deka deep cycle batteries that will each charge to 6.45 and then settle to to 6.35. Batteries are complex electro-chemical devices, they are not like a bucket you simply fill with water. The battery was left in a state of discharge too long. In 12V/150Ah,1.250 Filling gravityand testes @27°C. A fully charged battery has a specific gravity of 1.265 and no cell should differ by more than 0.05. BU-603: How to Calibrate a “Smart” Battery, BU-604: How to Process Data from a “Smart” Battery, BU-704a: Shipping Lithium-based Batteries by Air, BU-801: Setting Battery Performance Standards. Voltages and currents and time periods must be kept within specific boundries or you will destroy these sensitive devices. PLEASE REPLY.. To AAnya This is what people are attempting to discuss on these pages. You will know that the equalization process is complete when the specific gravity values no longer increase during the gassing stage. IREVERT TO THIS SITE, QUITE OFTEN,DUE TO MY LACK OF MEMORY,SENIOR MOMENTS. Is there some technical basis for the chemical mix you describe? Stay Charged! They are all boiling the liquid out and will not hold a charge long enough to power the cart. My generator comes on when V is 21.8, for 4 min. I’ve been reading some of your advise. 3. Is this of concern, and if so what can I do. To clarify: My BMW 320D is 13 years old with the original battery. Avoid deep discharges. Stennis, are you still looking for correct method to store batteries over long periods of inactivity. Which begs the question: Why did you/someone tip the battery over? Sir I have bought 4 deep cycles batteries for my car but as my car goes on a dump,the batteries are shaking and water is moving up and down. This explained an unusual battery situation we experienced where (after a key fob had been left in the vehicle overnight) the battery experienced a discharged as the car continued to ‘poll’ for the presence of a key (this is an electronically started Mazda 3). Is it normal or the new battery is faulty. Based on the specific gravity… checked out the fine print on the walmart bottle, the water is filtered and fed ozone, by a variety of means. You are right, the battery was fully discharged. Open circuit voltage of the battery was 12.20V. When i opened my bike’s battery after two years ( it seemed dischard all the time) i found the electrolyte was solid at the bottom i topped the battery with distilled water from a closed container but i still gave performance as before. Should it only get 4 hours or less when not plugged in? The white or grey coating on neg/pos terminals is caused by electrolyte vapour from inside batt condensing on metal ext parts- to stop, clean conn, refit securely, & apply a coating to ext metal conns- pet jelly, or hi-melt grease, or even an oil film. The higher the acid concentration in the electrolyte, the higher the specific gravity. can there be too much electrolyte in the batteries and can this be remedied.. So, now, when I measure 12,8~12,9, it gives me some thoughts. https://www.offgridquest.com/energy/gravity-battery-an-illustrated-concept-d It worked for very little time. I was under the impression that the deep cycle marine batteries would last longer. Copyright 2021 VDC Electronics. I called the technician and he told the specific gravity was low just 1.150 and that a specific charger may be used to increase sg. After 3 months sitting, my golf cart batteries in Florida, I am told they are dry and completely dead. The telephone office batteries are always very clean, well maintained (the best) Fully charge batt- don,t overcharge. Shekhar - A battery in the situation you describe, with an SG of 1.150, is for all intents and purposes fully discharged and needs to be charged. IS HE TELLING ME THE TRUTH? I am also inclining towards an impurity or other manufacturing problem. Really- seems as if this application has not been really thought out!(IMHO). can a pluser make prolonged the lead acid battery life,and avoid sulfation. Thanx once more. Specific gravity can be measured using a hydrometer. 2. . Does this mean I need to get them equalized? I have a golf cart with six 6 volt lead acid batteries, NOT maintenance-free.