The readily available XLR3 is also used by some manufacturers as power supply plugs despite their being a well-accepted standard for other purposes. In Australia, a T-configuration Clipsal socket is used for extra-low voltage DC power outlets, such as in stand-alone power systems (SAPS) or on boats, in order to prevent accidental connections of 12 V appliances into socket-outlets. This connector is also used for temporary equipment in emergency vehicles. The connector pins are mutually perpendicular, and are usually oriented to look like a capital T. Polarity at the outlet can be random, and must be verified to avoid equipment damage. Due to the popularity of USB for mobile phones and tablets, USB sockets and plugs have become a common choice for other small devices that require five volts or less, even those that require no data connection. Examples include flashlights, toys such as small helicopters, and rechargeable battery packs (which in turn provide five volts over USB to recharge other devices). Wall sockets with built-in USB power adapters and USB sockets are available. The EU has adapted the common external power supply specification, which standardizes data-enabled mobile phones to use the micro USB-B connector. As of 2016, most new mobile phones use this connector for charging. In 2012, the USB Power Delivery (PD) specification was released. The USB PD specification provides the ability for 5 V devices to draw more than (the USB battery-charging specification limit of) 7.5 W of power from USB "PD-aware" ports when using PD-aware USB cables. The specification also allows USB PD ports to provide even greater power at higher voltages over PD-aware cables – up to 36 W at 12 V and 60 W at 20 V (for micro-USB connectors) and up to 60 W at 12 V and 100 W at 20 V (for standard USB A/B connectors). The new USB-C plug is expected to eventually become the new standard for charging (and data transfer) over USB. These low voltage connectors are rated at or below 1500 VDC. The Anderson SBS and SBS Mini series of connectors are rated at up to 600 VDC at (depending on the connector) 50 A, 75 A or 110 A. They are only rated for disconnection under load at up to 120 VDC however. These connectors see use as battery bank connectors in higher power UPS systems, where the battery bank voltages are between 48 VDC and 500 VDC.