If they don't make a point of telling you what battery they're using, then my bet is that it's cheap and nasty.
For the same money, I bought a Calibre battery box (with overload protection, cigarette lighter socket, etc.) and, separately, a good quality AGM 60Ah battery.
Edit:
AGM = Absorbed Glass Mat, which is a deep cycle battery type:
Quote:
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Originally Posted by http://www.firststartbatteries.com.au/whyagmbattery.html
10 reasons why you should choose an AGM Battery:- They are totally sealed against leakage and classed as spill proof;
- They can be mounted on their side or end to suit space or environment;
- They can be mounted inside your car, 4WD, caravan, camper or motor home, truck or marine vessel;
- They do not need to be in a sealed box vented to the outside;
- Because they have low internal resistance, they can be fully recharged at a lower voltage and accept a larger current (amps);
- From a standard car, 4WD or truck alternator they wil recharge quickly in about 2-3 hours. A deep cycle wet cell battery can take 8-12 hours to achieve only 70% to 80% of its potential charge;
- They can be discharged much deeper than conventional deep cycle batteries;
- Because of their design, AGM batteries can be recharged up to 5 times faster then a regular wet cell battery. AGM batteries are compatible for alarm penels, cars, 4WD, caravan, campers, motorhomes, truck and marine applications;
- An AGM battery when left unattended will only discharge at a rate of up to 3% per month and even after 12 months sitting idle can be recharged and put back to a full charge. A normal wet cell battery discharges at a rate of up to 4% per week;
- AGM batteries were originally developed for the military. They are designed and built tough, and will take an enormous pounding. They are designed to withstand shock and vibration better than any standard battery.
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