Can I take a wheelchair, scooter or other equipment that is powered by a sealed AGM or Gel battery on a airplane or cruise ship?
Yes. There should be no problem, the battery is considered non-spill able, non-hazardous, since it is a absorbed glass mat design. These sealed lead acid valve regulated (VRLA) batteries are classified as "Battery, wet non-spill able, not subject to regulations" by DOT and IMO. By IATA they are classified as "Not restricted for air transport" and they are in compliance with IATA/ICAO special provision A67. For the gelled electrolyte batteries, they are classified as "Battery, wet, filled with acid, UN2794, Class 8". They can be legally shipped via air with special packaging etc.
How can a standard automotive or marine battery's state of charger be accurately measured?
The state of charger of a lead acid battery is most accurately determined by measuring the specific gravity of the electrolyte. This is done with a hydrometer. Voltage also indicates the level of charger when measured in an open circuit condition. This should be done with a voltmeter. For an accurate voltage reading, the battery should also be allowed to rest for a period sufficient to let the voltage stabilize.
My new laptop battery is not Charging. What is wrong?
New batteries are shipped in a discharged condition and must be charged before use. We generally recommend an overnight charger (approximately twelve hours). Refer to the user's manual for charging instructions. Rechargeable batteries should be cycled (fully charged and then fully discharged) two to four times initially to allow them to reach their full capacity. (Note: it is normal for a battery to become warm to the touch during charging and discharging).
Can batteries freeze?
In a partially discharged state, the electrolyte in a lead acid battery may freeze. At a 40% state of charger, electrolyte will freeze if the temperature reaches approximately ?6.0°F. The freezing temperature of the electrolyte in a fully charged battery is -92.0°F.
