Table 2.

Mean deployment length, and battery performance for GPS collars used in NHP studies^a

Brand	Model	N	Collar deployment length (days)	FSR	Battery life performance (%) d			Drop-off performance (%)e
					> Expected	Maintained	< Expected	Worked	Failed
Advanced Telemetry Systems	G2110B	22	324 ± 35	86 ± 11.8	95.5	–	4.5	100	–
e-Obs Digital Telemetry	Collar 1A, 1C, 1D	42	172.5 ± 41.5	93.2 ± 7.5	41.4	29.1.0	29.5	NAf
Lotek	WildCell SD	7	431 ± 36	82.8 ± 16.8	58.4	16.6	25	50	50
Lotek	7000SLU	19	275 ± 145	91.0 ± 19.6	10.5	84.2	5.2	–	100
Telemetry solutionsb	Quantum 4000	54	140 ± 122	87.8 ± 8.7	41.7	58.3	–	66.7	33.3
Televilt	Porsec 120	1	9	20.0	–	100.0	–	100	–
Tellus	Ultralight	7	67 ± 16	96.1 ± 2	–	91.7	8.3	100	–
Tellusc	Micro	6	81 ± 21c	65.9 ± 4.24	–	–	100	50	50
Telonics	TGW-4580; 4583; 4500	21	143 ± 77	13.2 ± 2.1	100	–	–	–	NA

^aNot all data were available for all collars. FSR is the overall fix success rate based on the total number of programmed

^bFive collars malfunctioned

^cTwo collars malfunctioned

^dSeveral studies were not able to recover collars and thus the battery life performance of these units is unknown and accounts for the discrepancy in the reported percent battery life performance not summing to 100% for all collars listed. Sample sizes are indicated for full collar deployments only and exclude those collars that were removed early by either the NHP or the research team

^eSeveral collars were removed by either the NHP or the researchers rather than activating the drop-off unit; sample sizes are reported only for collars with drop-off units that researchers attempted to use

^fe-Obs Digital Telemetry does not manufacture drop-off units