NAPS-02, a wireless router specialized for COOLSPOT can operate the battery in a short time. Using eight D batteries for whole one day. The interface for the battery is an optional.

Operation time of COOLSPOT: NAPS-02 with PHS(b-mobile)

Battery	Number	Operation time		Remarks
		about	accurate
AA size Oxyride (Oxy Nickel Hydroxide) battery	6 cells in a series	5 hours	320 minutes	Measured not with b-mobile but with DDI Pocket "AH-S504C" and Panasonic's Battery "ZR6Y"
AA size Nickel-Hydrogen rechargeable battery		3 hours	185 minutes	1600mAh, for digital cameras, standard in Japan.
		5.8 hours	350 minutes	2150mAh
AA size Alkaline battery	4 cells in a series	1 hours	88 minutes
	6 cells in a series	2 hours	127 minutes
D size Nickel -Hydrogen rechargeable battery	5 cells in a series	5 hours	304 minutes	5500mAh
D size Alkaline battery	5 cells in a series	7 hours	466 minutes
	6 cells in a series	20 hours	1208 minutes
	8 cells(*)	33 hours (over one day)	1800 minutes	* 2 pair units parallel (One unit is a 4 cells in a series)
MyBattery by Japan Trust Technology Inc.	One unit	9 hours	555 minutes	(Measured in 12 May 2003, 6V mode, 2700mAh) http://www.jtt.ne.jp/products/pc/mybatt/ (written in Japanese)

Measuring method:

1. Insert b-mobile card (BMH10-J) in NAPS-02 and put the power plug in a socket. (When starting, begin the measurement).
2. Execute Ping(64bytes) continuous from a client laptop PC (Thinkpad s30 inside wireless LAN edition) to a specific site every second.
3. When the telco cut its connection, a continuous connection is maintained by the automatic re-dial function of NAPS-02.
4. Time when the b-mobile card is not able to be kept dialing is assumed (because of the voltage low) to be operation time.

Notes:

1. This table is a reference value, so that we don't guarantee the operation time. Because there are an individual difference of the battery and a difference by charging time, etc.
2. The operation time is depends on which telecommunication card is installed.